| Saturday, January 17 |
| Former Pirate Ed Kinsella dies in Bloomington, IL at the age of 95. |
| Thursday, January 22 |
| Future Pirate Jimmy Anderson is born in Portsmouth, VA. |
| Tuesday, February 10 |
| Former Pirate Eddie Moore dies in Ft.Myers, FL at the age of 78. |
| Tuesday, March 16 |
| Future Pirate Abraham Nunez is born in Santo Domingo, D.R. |
| Friday, April 9 |
| » Major-league debuts: Butch Wynegar (Twins) |
| Saturday, April 10 |
| » Defeated Phillies (0-1), 5-4 | Veteran's Stadium (1-0) | 1-0 | |
| » W: Larry Demery (1-0) L: Tug McGraw (0-1) | Second | ½ out |
| Sunday, April 11 |
| » Defeated Phillies (0-2), 8-3 | Veteran's Stadium (2-0) | 2-0 | Won 2 |
| » W: Bruce Kison (1-0) L: Steve Carlton (0-1) S: Bob Moose (1) | First | -- |
| Monday, April 12 |
| Future Pirate Jeff Wallace is born in Wheeling, WV. |
| Tuesday, April 13 |
| » Defeated Cardinals (1-3), 14-4 | Three Rivers Stadium (1-0) | 3-0 | Won 3 |
| » W: Jerry Reuss (1-0) L: Pete Falcone (0-1) | First | -- |
| Thursday, April 15 |
| » Defeated Cardinals (1-4), 9-3 | Three Rivers Stadium (2-0) | 4-0 | Won 4 |
| » W: Jim Rooker (1-0) L: Lynn McGlothen (1-1) S: Ramon Hernandez (1) | First | -- |
| Friday, April 16 |
| » Defeated Mets (3-4), 3-1 | Three Rivers Stadium (3-0) | 5-0 | Won 5 |
| » W: Doc Medich (1-0) L: Mickey Lolich (0-2) | First | -- |
| Saturday, April 17 |
| » Lost to Mets (4-4), 17-1 | Three Rivers Stadium (3-1) | 5-1 | |
| » W: Jerry Koosman (1-0) L: Bruce Kison (1-1) | First | -- |
| Sunday, April 18 |
| » Defeated Mets (4-5), 7-5 | Three Rivers Stadium (4-1) | 6-1 | |
| » W: Jerry Reuss (2-0) L: Craig Swan (0-1) S: Ramon Hernandez (2) | First | -- |
| Tuesday, April 20 |
| » Lost to Phillies (4-3), 5-1 | Three Rivers Stadium (4-2) | 6-2 | |
| » W: Jim Kaat (1-1) L: John Candelaria (0-1) | First | -- |
| Wednesday, April 21 |
| » Lost to Phillies (5-3), 3-0 | Three Rivers Stadium (4-3) | 6-3 | Lost 2 |
| » W: Tom Underwood (1-0) L: Doc Medich (1-1) S: Tug McGraw (1) | First | -- |
| Friday, April 23 |
| » Lost to Giants (6-5), 7-3 | Candlestick Park (0-1) | 6-4 | Lost 3 |
| » W: John Montefusco (3-1) L: Jerry Reuss (2-1) S: Gary Lavelle (4) | First | -- |
| Saturday, April 24 |
| » Lost to Giants (7-5), 3-1 | Candlestick Park (0-2) | 6-5 | Lost 4 |
| » W: Ed Halicki (2-2) L: Jim Rooker (1-1) S: Gary Lavelle (5) | Second | ½ out |
| Sunday, April 25 |
| » Defeated Giants (7-6), 3-0 | Candlestick Park (1-2) | 7-5 | |
| » W: John Candelaria (1-1) L: Mike Caldwell (0-2) | First | -- |
| Monday, April 26 |
| » Lost to Dodgers (6-9), 7-1 | Dodger Stadium (0-1) | 7-6 | |
| » W: Tommy John (1-1) L: Doc Medich (1-2) | Third | ½ out |
| Tuesday, April 27 |
| » Lost to Dodgers (7-9), 5-3 | Dodger Stadium (0-2) | 7-7 | Lost 2 |
| » W: Doug Rau (3-0) L: Bruce Kison (1-2) S: Charlie Hough (1) | Third | 1½ out |
| Wednesday, April 28 |
| » Lost to Dodgers (8-9), 2-1 | Dodger Stadium (0-3) | 7-8 | Lost 3 |
| » W: Burt Hooton (1-2) L: Jerry Reuss (2-2) | Fifth | 2½ out |
| Friday, April 30 |
| » Defeated Padres (9-10), 4-3 | San Diego/Jack Murphy Stadium (1-0) | 8-8 | |
| » W: Jim Rooker (2-1) L: Dan Spillner (0-4) S: Bob Moose (2) | Third | 3 out |
| Saturday, May 1 |
| » Defeated Padres (9-11), 10-6 | San Diego/Jack Murphy Stadium (2-0) | 9-8 | Won 2 |
| » W: John Candelaria (2-1) L: Bill Greif (1-2) | Third | 2½ out |
| Sunday, May 2 |
| » Lost to Padres (10-11), 4-2 | San Diego/Jack Murphy Stadium (2-1) | 9-9 | |
| » W: Randy Jones (5-1) L: Doc Medich (1-3) | Third | 2½ out |
| Tuesday, May 4 |
| » Defeated Giants (8-13), 6-5 | Three Rivers Stadium (5-3) | 10-9 | |
| » W: Jerry Reuss (3-2) L: Mike Caldwell (0-4) S: Bob Moose (3) | Third | 2½ out |
| Wednesday, May 5 |
| » Defeated Giants (8-14), 6-1 | Three Rivers Stadium (6-3) | 11-9 | Won 2 |
| » W: Bruce Kison (2-2) L: Ed Halicki (2-4) | Third | 2½ out |
| Thursday, May 6 |
| » Defeated Giants (8-15), 3-0 | Three Rivers Stadium (7-3) | 12-9 | Won 3 |
| » W: Jim Rooker (3-1) L: Jim Barr (1-2) S: Larry Demery (1) | Third | 2 out |
| Friday, May 7 |
| » Defeated Braves (8-16), 3-1 | Three Rivers Stadium (8-3) | 13-9 | Won 4 |
| » W: John Candelaria (3-1) L: Andy Messersmith (0-3) | Third | 2 out |
| Saturday, May 8 |
| » Defeated Braves (8-17), 5-3 | Three Rivers Stadium (9-3) | 14-9 | Won 5 |
| » W: Doc Medich (2-3) L: Phil Niekro (3-2) S: Dave Giusti (1) | Third | 2 out |
| Sunday, May 9 |
| » Defeated Braves (8-18), 5-2 | Three Rivers Stadium (10-3) | 15-9 | Won 6 |
| » W: Jerry Reuss (4-2) L: Dick Ruthven (3-4) | Third | 1 out |
| Tuesday, May 11 |
| » Lost to Reds (16-10), 6-0 | Riverfront Stadium (0-1) | 15-10 | |
| » W: Gary Nolan (3-1) L: Bruce Kison (2-3) | Third | 2 out |
| Wednesday, May 12 |
| » Defeated Reds (16-11), 6-3 | Riverfront Stadium (1-1) | 16-10 | |
| » W: Jim Rooker (4-1) L: Don Gullett (2-2) | Third | 1 out |
| Friday, May 14 |
| » Lost to Dodgers (19-11), 3-2 | Three Rivers Stadium (10-4) | 16-11 | |
| » W: Charlie Hough (3-0) L: John Candelaria (3-2) S: Mike Marshall (7) | Third | 2 out |
| Saturday, May 15 |
| » Defeated Dodgers (19-12), 4-2 | Three Rivers Stadium (11-4) | 17-11 | |
| » W: Doc Medich (3-3) L: Doug Rau (4-2) S: Bob Moose (4) | Second | 2 out |
| Sunday, May 16 |
| » Lost to Dodgers (20-12), 6-0 | Three Rivers Stadium (11-5) | 17-12 | |
| » W: Burt Hooton (3-2) L: Jerry Reuss (4-3) | Third | 3 out |
| Monday, May 17 |
| » Defeated Cardinals (14-19), 2-1 | Busch Stadium II (1-0) | 18-12 | |
| » W: Bruce Kison (3-3) L: Jack Curtis (2-4) S: Bob Moose (5) | Second | 2½ out |
| Future Pirate Jose Guillen is born in San Cristobal, D.R. |
| Tuesday, May 18 |
| » Defeated Cardinals (14-20), 4-1 | Busch Stadium II (2-0) | 19-12 | Won 2 |
| » W: Jim Rooker (5-1) L: Al Hrabosky (0-3) | Second | 2 out |
| Wednesday, May 19 |
| » Defeated Cardinals (14-21), 7-6 | Busch Stadium II (3-0) | 20-12 | Won 3 |
| » W: Ramon Hernandez (1-0) L: Eric Rasmussen (3-5) S: Bob Moose (6) | Second | 2 out |
| Thursday, May 20 |
| » Lost to Cardinals (15-21), 4-1 | Busch Stadium II (3-1) | 20-13 | |
| » W: John Denny (2-2) L: Doc Medich (3-4) | Second | 3 out |
| Friday, May 21 |
| » Lost to Cubs (15-19), 5-4 | Three Rivers Stadium (11-6) | 20-14 | Lost 2 |
| » W: Rick Reuschel (3-3) L: Larry Demery (1-1) S: Darold Knowles (3) | Second | 4 out |
| Saturday, May 22 |
| » Defeated Cubs (15-20), 4-3 | Three Rivers Stadium (12-6) | 21-14 | |
| » W: Bob Moose (1-0) L: Paul Reuschel (1-2) | Second | 3 out |
| Sunday, May 23 |
| » Lost to Cubs (16-20), 6-5 | Three Rivers Stadium (12-7) | 21-15 | |
| » W: Oscar Zamora (3-0) L: Kent Tekulve (0-1) S: Bruce Sutter (1) | Second | 3½ out |
| » Defeated Cubs (16-21), 9-1 | Three Rivers Stadium (13-7) | 22-15 | |
| » W: Jerry Reuss (5-3) L: Mike Garman (2-3) | Second | 3½ out |
| Monday, May 24 |
| » Lost to Expos (15-19), 4-2 | Three Rivers Stadium (13-8) | 22-16 | |
| » W: Woodie Fryman (6-2) L: John Candelaria (3-3) S: Fred Scherman (1) | Second | 4½ out |
| Tuesday, May 25 |
| » Lost to Expos (16-19), 6-3 | Three Rivers Stadium (13-9) | 22-17 | Lost 2 |
| » W: Wayne Granger (1-0) L: Bob Moose (1-1) | Second | 5½ out |
| Wednesday, May 26 |
| » Defeated Expos (16-20), 6-3 | Three Rivers Stadium (14-9) | 23-17 | |
| » W: Larry Demery (2-1) L: Dan Warthen (1-4) S: John Candelaria (1) | Second | 5½ out |
| Saturday, May 29 |
| » Lost to Cubs (19-22), 4-1 | Wrigley Field (0-1) | 23-18 | |
| » W: Bill Bonham (3-2) L: Bruce Kison (3-4) S: Oscar Zamora (1) | Second | 6½ out |
| Sunday, May 30 |
| » Defeated Cubs (19-23), 4-2 | Wrigley Field (1-1) | 24-18 | |
| » W: Jim Rooker (6-1) L: Ray Burris (1-7) | Second | 6½ out |
| Former Pirate Max Carey dies in Miami, FL at the age of 87. |
| Monday, May 31 |
| » Lost to Mets (24-23), 13-2 | Shea Stadium (0-1) | 24-19 | |
| » W: Jon Matlack (5-1) L: Jerry Reuss (5-4) | Second | 6½ out |
| » Defeated Mets (24-24), 2-1 | Shea Stadium (1-1) | 25-19 | |
| » W: Doc Medich (4-4) L: Bob Apodaca (1-3) | Second | 6½ out |
| Tuesday, June 1 |
| » Defeated Mets (24-25), 3-2 | Shea Stadium (2-1) | 26-19 | Won 2 |
| » W: John Candelaria (4-3) L: Jerry Koosman (6-2) | Second | 6½ out |
| Wednesday, June 2 |
| » Defeated Expos (16-25), 4-2 | Parc Jarry (1-0) | 27-19 | Won 3 |
| » W: Bruce Kison (4-4) L: Woodie Fryman (6-3) S: Dave Giusti (2) | Second | 6½ out |
| Thursday, June 3 |
| » Lost to Expos (17-25), 7-1 | Parc Jarry (1-1) | 27-20 | |
| » W: Don Stanhouse (3-1) L: Jim Rooker (6-2) | Second | 6½ out |
| Friday, June 4 |
| » Defeated Padres (24-23), 7-2 | Three Rivers Stadium (15-9) | 28-20 | |
| » W: Jerry Reuss (6-4) L: Dave Freisleben (2-1) | Second | 5½ out |
| Saturday, June 5 |
| » Lost to Padres (25-23), 11-9 | Three Rivers Stadium (15-10) | 28-21 | |
| » W: Dave Freisleben (3-1) L: Ramon Hernandez (1-1) | Second | 5½ out |
| Sunday, June 6 |
| » Lost to Padres (26-23), 6-1 | Three Rivers Stadium (15-11) | 28-22 | Lost 2 |
| » W: Brent Strom (6-3) L: John Candelaria (4-4) | Second | 6½ out |
| Monday, June 7 |
| » Defeated Reds (32-20), 5-4 | Three Rivers Stadium (16-11) | 29-22 | |
| » W: Bob Moose (2-1) L: Will McEnaney (1-3) S: Dave Giusti (3) | Second | 6½ out |
| Tuesday, June 8 |
| » Lost to Reds (33-20), 10-5 | Three Rivers Stadium (16-12) | 29-23 | |
| » W: Santo Alcala (6-1) L: Jim Rooker (6-3) S: Will McEnaney (2) | Second | 7½ out |
| Wednesday, June 9 |
| » Lost to Reds (34-20), 6-1 | Three Rivers Stadium (16-13) | 29-24 | Lost 2 |
| » W: Gary Nolan (5-3) L: Jerry Reuss (6-5) | Second | 7½ out |
| Thursday, June 10 |
| » Lost to Reds (35-20), 6-1 | Three Rivers Stadium (16-14) | 29-25 | Lost 3 |
| » W: Don Gullett (5-2) L: Doc Medich (4-5) | Second | 8½ out |
| Friday, June 11 |
| » Defeated Braves (22-32), 6-2 | Atlanta-Fulton County Stadium (1-0) | 30-25 | |
| » W: John Candelaria (5-4) L: Roger Moret (2-2) S: Bob Moose (7) | Second | 8½ out |
| Saturday, June 12 |
| » Defeated Braves (22-33), 4-2 | Atlanta-Fulton County Stadium (2-0) | 31-25 | Won 2 |
| » W: Bob Moose (3-1) L: Adrian Devine (1-2) S: Kent Tekulve (1) | Second | 8½ out |
| Sunday, June 13 |
| » Defeated Braves (22-34), 6-5 | Atlanta-Fulton County Stadium (3-0) | 32-25 | Won 3 |
| » W: Larry Demery (3-1) L: Max Leon (1-3) S: Bob Moose (8) | Second | 7 out |
| » Major-league debuts: Rick Langford (Pirates) |
| Monday, June 14 |
| » Defeated Astros (29-33), 2-1 | Astrodome (1-0) | 33-25 | Won 4 |
| » W: Jerry Reuss (7-5) L: J.R. Richard (7-6) | Second | 6½ out |
| Wednesday, June 16 |
| » Defeated Astros (29-34), 6-3 | Astrodome (2-0) | 34-25 | Won 5 |
| » W: Doc Medich (5-5) L: Joaquin Andujar (2-4) S: Larry Demery (2) | Second | 7 out |
| Friday, June 18 |
| » Defeated Astros (29-35), 7-3 | Three Rivers Stadium (17-14) | 35-25 | Won 6 |
| » W: John Candelaria (6-4) L: J.R. Richard (7-7) | Second | 7½ out |
| Sunday, June 20 |
| » Lost to Astros (30-35), 9-4 | Three Rivers Stadium (17-15) | 35-26 | |
| » W: Tom Griffin (5-1) L: Bob Moose (3-2) | Second | 8 out |
| Future Pirate Rob Mackowiak is born in Oak Lawn, IL. |
| Tuesday, June 22 |
| » Defeated Cubs (28-37), 10-7 | Wrigley Field (2-1) | 36-26 | |
| » W: Larry Demery (4-1) L: Darold Knowles (2-3) S: Ramon Hernandez (3) | Second | 7½ out |
| Wednesday, June 23 |
| » Lost to Cubs (29-37), 6-5 | Wrigley Field (2-2) | 36-27 | |
| » W: Oscar Zamora (4-2) L: Bob Moose (3-3) | Second | 8½ out |
| Thursday, June 24 |
| » Lost to Cubs (30-37), 2-1 | Wrigley Field (2-3) | 36-28 | Lost 2 |
| » W: Oscar Zamora (5-2) L: Rick Langford (0-1) | Second | 9½ out |
| Friday, June 25 |
| » Defeated Expos (23-40), 9-2 | Parc Jarry (2-1) | 37-28 | |
| » W: Bruce Kison (5-4) L: Don Carrithers (3-6) | Second | 9½ out |
| Saturday, June 26 |
| » Defeated Expos (23-41), 7-6 | Parc Jarry (3-1) | 38-28 | Won 2 |
| » W: Larry Demery (5-1) L: Dale Murray (0-5) | Second | 8½ out |
| Sunday, June 27 |
| » Lost to Expos (24-41), 4-3 | Parc Jarry (3-2) | 38-29 | |
| » W: Woodie Fryman (8-5) L: Doc Medich (5-6) S: Dale Murray (7) | Second | 9½ out |
| Monday, June 28 |
| » Defeated Cubs (30-41), 9-2 | Three Rivers Stadium (18-15) | 39-29 | |
| » W: Jim Rooker (7-3) L: Joe Coleman (2-8) | Second | 9½ out |
| Tuesday, June 29 |
| » Defeated Cubs (30-42), 10-1 | Three Rivers Stadium (19-15) | 40-29 | Won 2 |
| » W: John Candelaria (7-4) L: Steve Renko (2-4) | Second | 9½ out |
| Wednesday, June 30 |
| » Defeated Cubs (30-43), 7-5 | Three Rivers Stadium (20-15) | 41-29 | Won 3 |
| » W: Bruce Kison (6-4) L: Bill Bonham (6-5) S: Bob Moose (9) | Second | 9 out |
| Friday, July 2 |
| » Defeated Phillies (50-21), 10-9 | Three Rivers Stadium (21-15) | 42-29 | Won 4 |
| » W: Ramon Hernandez (2-1) L: Gene Garber (3-2) | Second | 8 out |
| Saturday, July 3 |
| » Lost to Phillies (51-21), 3-2 | Three Rivers Stadium (21-16) | 42-30 | |
| » W: Tug McGraw (5-4) L: Bob Moose (3-4) | Second | 9 out |
| Sunday, July 4 |
| » Lost to Phillies (52-21), 10-5 | Three Rivers Stadium (21-17) | 42-31 | Lost 2 |
| » W: Steve Carlton (8-3) L: Larry Demery (5-2) S: Ron Reed (3) | Second | 9 out |
| » Defeated Phillies (52-22), 7-1 | Three Rivers Stadium (22-17) | 43-31 | |
| » W: Bruce Kison (7-4) L: Jim Kaat (8-3) | Second | 9 out |
| Monday, July 5 |
| » Lost to Braves (37-42), 8-6 | Atlanta-Fulton County Stadium (3-1) | 43-32 | |
| » W: Bruce Dal Canton (2-1) L: Ramon Hernandez (2-2) S: Mike Marshall (11) | Second | 9 out |
| Tuesday, July 6 |
| » Lost to Braves (38-42), 4-2 | Atlanta-Fulton County Stadium (3-2) | 43-33 | Lost 2 |
| » W: Andy Messersmith (9-6) L: Jim Rooker (7-4) S: Mike Marshall (12) | Second | 9 out |
| Wednesday, July 7 |
| » Defeated Braves (38-43), 9-7 | Atlanta-Fulton County Stadium (4-2) | 44-33 | |
| » W: Jerry Reuss (8-5) L: Dick Ruthven (10-8) S: Bob Moose (10) | Second | 8 out |
| Friday, July 9 |
| » Lost to Reds (52-31), 12-11 | Riverfront Stadium (1-2) | 44-34 | |
| » W: Rawly Eastwick (6-3) L: Larry Demery (5-3) | Second | 9½ out |
| » Lost to Reds (53-31), 2-1 | Riverfront Stadium (1-3) | 44-35 | Lost 2 |
| » W: Fred Norman (7-2) L: Doc Medich (5-7) | Second | 9½ out |
| Saturday, July 10 |
| » Defeated Reds (53-32), 7-1 | Riverfront Stadium (2-3) | 45-35 | |
| » W: John Candelaria (8-4) L: Jack Billingham (6-7) | Second | 10 out |
| Sunday, July 11 |
| » Defeated Reds (53-33), 8-5 | Riverfront Stadium (3-3) | 46-35 | Won 2 |
| » W: Kent Tekulve (1-1) L: Pedro Borbon (2-2) S: Jerry Reuss (1) | Second | 10 out |
| Thursday, July 15 |
| » Defeated Braves (40-46), 13-1 | Three Rivers Stadium (23-17) | 47-35 | Won 3 |
| » W: John Candelaria (9-4) L: Phil Niekro (9-5) | Second | 10 out |
| Friday, July 16 |
| » Defeated Braves (40-47), 7-2 | Three Rivers Stadium (24-17) | 48-35 | Won 4 |
| » W: Jerry Reuss (9-5) L: Andy Messersmith (9-8) | Second | 9 out |
| Saturday, July 17 |
| » Lost to Braves (41-47), 10-2 | Three Rivers Stadium (24-18) | 48-36 | |
| » W: Dick Ruthven (11-8) L: Bruce Kison (7-5) | Second | 9 out |
| Sunday, July 18 |
| » Lost to Reds (56-34), 9-8 | Three Rivers Stadium (24-19) | 48-37 | Lost 2 |
| » W: Jack Billingham (7-7) L: Doc Medich (5-8) S: Rawly Eastwick (10) | Second | 10 out |
| Monday, July 19 |
| » Lost to Reds (57-34), 4-2 | Three Rivers Stadium (24-20) | 48-38 | Lost 3 |
| » W: Pat Zachry (8-3) L: Jim Rooker (7-5) | Second | 11 out |
| Tuesday, July 20 |
| » Defeated Astros (47-46), 9-5 | Three Rivers Stadium (25-20) | 49-38 | |
| » W: John Candelaria (10-4) L: Tom Griffin (5-3) S: Kent Tekulve (2) | Second | 10½ out |
| » Lost to Astros (48-46), 4-3 | Three Rivers Stadium (25-21) | 49-39 | |
| » W: Ken Forsch (4-2) L: Dave Giusti (0-1) | Second | 10½ out |
| » Major-league debuts: Bo McLaughlin and Joe Sambito (Astros) |
| Wednesday, July 21 |
| » Defeated Astros (48-47), 5-1 | Three Rivers Stadium (26-21) | 50-39 | |
| » W: Jerry Reuss (10-5) L: Larry Dierker (9-9) | Second | 10 out |
| » Defeated Astros (48-48), 4-1 | Three Rivers Stadium (27-21) | 51-39 | Won 2 |
| » W: Larry Demery (6-3) L: Joaquin Andujar (6-6) S: Dave Giusti (4) | Second | 10 out |
| Thursday, July 22 |
| » Lost to Phillies (61-28), 3-0 | Veteran's Stadium (2-1) | 51-40 | |
| » W: Tom Underwood (6-2) L: Bruce Kison (7-6) S: Ron Reed (7) | Second | 11 out |
| Friday, July 23 |
| » Lost to Phillies (62-28), 11-1 | Veteran's Stadium (2-2) | 51-41 | Lost 2 |
| » W: Jim Lonborg (12-5) L: Doc Medich (5-9) | Second | 12 out |
| Saturday, July 24 |
| » Defeated Phillies (62-29), 8-5 | Veteran's Stadium (3-2) | 52-41 | |
| » W: Jim Rooker (8-5) L: Larry Christenson (8-5) S: Dave Giusti (5) | Second | 12 out |
| » Lost to Phillies (63-29), 7-1 | Veteran's Stadium (3-3) | 52-42 | |
| » W: Steve Carlton (11-4) L: Bob Moose (3-5) | Second | 12 out |
| Sunday, July 25 |
| » Lost to Phillies (64-29), 13-7 | Veteran's Stadium (3-4) | 52-43 | Lost 2 |
| » W: Ron Reed (8-3) L: Dave Giusti (0-2) | Second | 13 out |
| Tuesday, July 27 |
| » Defeated Cardinals (42-53), 3-1 | Busch Stadium II (4-1) | 53-43 | |
| » W: Bruce Kison (8-6) L: Pete Falcone (6-11) | Second | 12½ out |
| Wednesday, July 28 |
| » Defeated Mets (51-50), 1-0 | Shea Stadium (3-1) | 54-43 | Won 2 |
| » W: Dave Giusti (1-2) L: Ken Sanders (1-2) | Second | 11½ out |
| Thursday, July 29 |
| » Defeated Mets (51-51), 2-1 | Shea Stadium (4-1) | 55-43 | Won 3 |
| » W: Kent Tekulve (2-1) L: Skip Lockwood (6-5) | Second | 11½ out |
| Friday, July 30 |
| » Defeated Expos (33-61), 4-3 | Three Rivers Stadium (28-21) | 56-43 | Won 4 |
| » W: Kent Tekulve (3-1) L: Joe Kerrigan (0-1) | Second | 10½ out |
| Saturday, July 31 |
| » Lost to Expos (34-61), 7-6 | Three Rivers Stadium (28-22) | 56-44 | |
| » W: Dale Murray (3-8) L: Bob Moose (3-6) | Second | 11½ out |
| Sunday, August 1 |
| » Lost to Expos (35-61), 2-0 | Three Rivers Stadium (28-23) | 56-45 | Lost 2 |
| » W: Steve Rogers (4-10) L: Bruce Kison (8-7) | Second | 13 out |
| Monday, August 2 |
| » Lost to Cardinals (43-57), 4-0 | Three Rivers Stadium (28-24) | 56-46 | Lost 3 |
| » W: Pete Falcone (7-11) L: Doc Medich (5-10) | Second | 13 out |
| Tuesday, August 3 |
| » Defeated Cardinals (43-58), 2-1 | Three Rivers Stadium (29-24) | 57-46 | |
| » W: Jim Rooker (9-5) L: Bill Greif (2-6) | Second | 13 out |
| » Lost to Cardinals (44-58), 4-2 | Three Rivers Stadium (29-25) | 57-47 | |
| » W: Al Hrabosky (6-6) L: Dave Giusti (1-3) S: Mike Wallace (2) | Second | 13 out |
| Wednesday, August 4 |
| » Defeated Cardinals (44-59), 2-1 | Three Rivers Stadium (30-25) | 58-47 | |
| » W: Dave Giusti (2-3) L: Mike Wallace (2-2) | Second | 13 out |
| Thursday, August 5 |
| » Lost to Mets (55-55), 7-4 | Three Rivers Stadium (30-26) | 58-48 | |
| » W: Jon Matlack (11-6) L: Jerry Reuss (10-6) S: Skip Lockwood (11) | Second | 14 out |
| Saturday, August 7 |
| » Defeated Mets (55-56), 12-3 | Three Rivers Stadium (31-26) | 59-48 | |
| » W: Bruce Kison (9-7) L: Tom Seaver (9-7) | Second | 13 out |
| » Lost to Mets (56-56), 4-2 | Three Rivers Stadium (31-27) | 59-49 | |
| » W: Nino Espinosa (1-2) L: Doc Medich (5-11) S: Skip Lockwood (12) | Second | 13 out |
| Sunday, August 8 |
| » Lost to Mets (57-56), 7-4 | Three Rivers Stadium (31-28) | 59-50 | Lost 2 |
| » W: Mickey Lolich (7-10) L: Jim Rooker (9-6) | Second | 14 out |
| Monday, August 9 |
| » Defeated Dodgers (59-52), 2-0 | Three Rivers Stadium (32-28) | 60-50 | |
| » W: John Candelaria (11-4) L: Doug Rau (10-9) | Second | 13½ out |
| Tuesday, August 10 |
| » Lost to Dodgers (60-52), 5-1 | Three Rivers Stadium (32-29) | 60-51 | |
| » W: Don Sutton (13-9) L: Jerry Reuss (10-7) | Second | 13½ out |
| Wednesday, August 11 |
| » Lost to Dodgers (61-52), 2-0 | Three Rivers Stadium (32-30) | 60-52 | Lost 2 |
| » W: Rick Rhoden (10-1) L: Larry Demery (6-4) | Second | 14½ out |
| Friday, August 13 |
| » Defeated Astros (58-60), 8-5 | Astrodome (3-0) | 61-52 | |
| » W: Kent Tekulve (4-1) L: Joe Niekro (4-8) | Second | 13 out |
| Saturday, August 14 |
| » Defeated Astros (58-61), 5-4 | Astrodome (4-0) | 62-52 | Won 2 |
| » W: Dave Giusti (3-3) L: Gene Pentz (3-3) | Second | 13 out |
| Sunday, August 15 |
| » Defeated Astros (58-62), 8-6 | Astrodome (5-0) | 63-52 | Won 3 |
| » W: Doc Medich (6-11) L: Dan Larson (2-4) S: Kent Tekulve (3) | Second | 11½ out |
| » Defeated Astros (58-63), 3-0 | Astrodome (6-0) | 64-52 | Won 4 |
| » W: Jerry Reuss (11-7) L: Joe Sambito (1-1) | Second | 11½ out |
| Tuesday, August 17 |
| » Lost to Giants (52-69), 7-6 | Candlestick Park (1-3) | 64-53 | |
| » W: Gary Lavelle (5-5) L: Bob Moose (3-7) S: Charlie Williams (1) | Second | 12½ out |
| Wednesday, August 18 |
| » Defeated Giants (52-70), 12-1 | Candlestick Park (2-3) | 65-53 | |
| » W: Jim Rooker (10-6) L: John Montefusco (13-10) | Second | 12½ out |
| Thursday, August 19 |
| » Defeated Giants (52-71), 1-0 | Candlestick Park (3-3) | 66-53 | Won 2 |
| » W: John Candelaria (12-4) L: Jim Barr (10-10) | Second | 12½ out |
| Friday, August 20 |
| » Lost to Dodgers (67-54), 8-1 | Dodger Stadium (0-4) | 66-54 | |
| » W: Doug Rau (11-10) L: Bruce Kison (9-8) S: Charlie Hough (10) | Second | 12½ out |
| Saturday, August 21 |
| » Lost to Dodgers (68-54), 5-1 | Dodger Stadium (0-5) | 66-55 | Lost 2 |
| » W: Don Sutton (15-9) L: Bob Moose (3-8) | Second | 13½ out |
| Sunday, August 22 |
| » Defeated Dodgers (68-55), 6-1 | Dodger Stadium (1-5) | 67-55 | |
| » W: Larry Demery (7-4) L: Rick Rhoden (11-2) S: Kent Tekulve (4) | Second | 13½ out |
| Monday, August 23 |
| » Lost to Padres (61-66), 5-4 | San Diego/Jack Murphy Stadium (2-2) | 67-56 | |
| » W: Jerry Johnson (1-1) L: Jim Rooker (10-7) S: Butch Metzger (13) | Second | 14½ out |
| Tuesday, August 24 |
| » Lost to Padres (62-66), 7-3 | San Diego/Jack Murphy Stadium (2-3) | 67-57 | Lost 2 |
| » W: Brent Strom (11-13) L: John Candelaria (12-5) | Second | 15½ out |
| Wednesday, August 25 |
| » Defeated Padres (62-67), 3-0 | San Diego/Jack Murphy Stadium (3-3) | 68-57 | |
| » W: Bruce Kison (10-8) L: Dave Freisleben (8-11) | Second | 14½ out |
| Friday, August 27 |
| » Defeated Giants (56-73), 5-2 | Three Rivers Stadium (33-30) | 69-57 | Won 2 |
| » W: Larry Demery (8-4) L: John Montefusco (13-11) | Second | 14 out |
| Saturday, August 28 |
| » Defeated Giants (56-74), 7-1 | Three Rivers Stadium (34-30) | 70-57 | Won 3 |
| » W: Jim Rooker (11-7) L: John D'Acquisto (3-8) | Second | 13 out |
| Sunday, August 29 |
| » Defeated Giants (56-75), 3-2 | Three Rivers Stadium (35-30) | 71-57 | Won 4 |
| » W: John Candelaria (13-5) L: Randy Moffitt (5-5) | Second | 12 out |
| Tuesday, August 31 |
| » Defeated Padres (63-70), 3-0 | Three Rivers Stadium (36-30) | 72-57 | Won 5 |
| » W: Jerry Reuss (12-7) L: Randy Jones (20-10) | Second | 10½ out |
| Wednesday, September 1 |
| » Defeated Padres (63-71), 4-1 | Three Rivers Stadium (37-30) | 73-57 | Won 6 |
| » W: Bruce Kison (11-8) L: Brent Strom (11-14) S: Kent Tekulve (5) | Second | 9½ out |
| Thursday, September 2 |
| » Defeated Padres (63-72), 5-0 | Three Rivers Stadium (38-30) | 74-57 | Won 7 |
| » W: Larry Demery (9-4) L: Dave Freisleben (8-12) | Second | 9 out |
| Friday, September 3 |
| » Defeated Expos (43-84), 9-7 | Parc Jarry (4-2) | 75-57 | Won 8 |
| » W: Jim Rooker (12-7) L: Don Stanhouse (8-9) S: Kent Tekulve (6) | Second | 7½ out |
| » Defeated Expos (43-85), 7-2 | Parc Jarry (5-2) | 76-57 | Won 9 |
| » W: John Candelaria (14-5) L: Don Carrithers (6-11) | Second | 7½ out |
| Saturday, September 4 |
| » Defeated Expos (43-86), 5-3 | Parc Jarry (6-2) | 77-57 | Won 10 |
| » W: Dave Giusti (4-3) L: Dale Murray (4-9) S: Kent Tekulve (7) | Second | 6½ out |
| Sunday, September 5 |
| » Lost to Expos (44-86), 1-0 | Parc Jarry (6-3) | 77-58 | |
| » W: Woodie Fryman (11-10) L: Jerry Reuss (12-8) | Second | 7½ out |
| Monday, September 6 |
| » Defeated Phillies (84-51), 6-2 | Three Rivers Stadium (39-30) | 78-58 | |
| » W: Bruce Kison (12-8) L: Jim Kaat (11-11) | Second | 5½ out |
| » Defeated Phillies (84-52), 5-1 | Three Rivers Stadium (40-30) | 79-58 | Won 2 |
| » W: Larry Demery (10-4) L: Tom Underwood (9-5) | Second | 5½ out |
| » Major-league debuts: Tony Armas (Pirates) |
| Wednesday, September 8 |
| » Defeated Phillies (84-53), 6-1 | Three Rivers Stadium (41-30) | 80-58 | Won 3 |
| » W: Jim Rooker (13-7) L: Steve Carlton (16-6) | Second | 4½ out |
| Thursday, September 9 |
| » Major-league debuts: Rick Bosetti (Phillies) |
| Friday, September 10 |
| » Lost to Expos (48-89), 4-2 | Three Rivers Stadium (41-31) | 80-59 | |
| » W: Woodie Fryman (12-10) L: John Candelaria (14-6) | Second | 5 out |
| Saturday, September 11 |
| » Defeated Expos (48-90), 4-3 | Three Rivers Stadium (42-31) | 81-59 | |
| » W: Jerry Reuss (13-8) L: Steve Rogers (6-15) S: Kent Tekulve (8) | Second | 4 out |
| » Major-league debuts: Andre Dawson (Expos) |
| Sunday, September 12 |
| » Defeated Expos (48-91), 6-1 | Three Rivers Stadium (43-31) | 82-59 | Won 2 |
| » W: Bruce Kison (13-8) L: Don Stanhouse (8-10) S: Kent Tekulve (9) | Second | 4 out |
| Monday, September 13 |
| » Lost to Mets (75-67), 5-0 | Three Rivers Stadium (43-32) | 82-60 | |
| » W: Tom Seaver (13-10) L: Larry Demery (10-5) | Second | 5 out |
| » Major-league debuts: Doug Bair (Pirates) |
| Tuesday, September 14 |
| » Lost to Mets (76-67), 4-3 | Three Rivers Stadium (43-33) | 82-61 | Lost 2 |
| » W: Skip Lockwood (8-7) L: Jim Rooker (13-8) | Second | 6 out |
| Wednesday, September 15 |
| » Defeated Phillies (88-56), 7-2 | Veteran's Stadium (4-4) | 83-61 | |
| » W: John Candelaria (15-6) L: Jim Kaat (11-13) | Second | 5 out |
| Thursday, September 16 |
| » Defeated Phillies (88-57), 7-6 | Veteran's Stadium (5-4) | 84-61 | Won 2 |
| » W: Kent Tekulve (5-1) L: Ron Reed (8-6) | Second | 4 out |
| Friday, September 17 |
| » Defeated Mets (77-70), 4-1 | Shea Stadium (5-1) | 85-61 | Won 3 |
| » W: Doc Medich (7-11) L: Jon Matlack (15-9) S: Dave Giusti (6) | Second | 3 out |
| Saturday, September 18 |
| » Lost to Mets (78-70), 6-2 | Shea Stadium (5-2) | 85-62 | |
| » W: Tom Seaver (14-10) L: Larry Demery (10-6) | Second | 4 out |
| Sunday, September 19 |
| » Lost to Mets (79-70), 7-6 | Shea Stadium (5-3) | 85-63 | Lost 2 |
| » W: Nino Espinosa (4-4) L: Dave Giusti (4-4) S: Skip Lockwood (17) | Second | 4 out |
| Monday, September 20 |
| » Lost to Mets (80-70), 5-4 | Shea Stadium (5-4) | 85-64 | Lost 3 |
| » W: Bob Apodaca (3-7) L: Kent Tekulve (5-2) | Second | 4½ out |
| Tuesday, September 21 |
| » Defeated Cubs (69-82), 4-3 | Wrigley Field (3-3) | 86-64 | |
| » W: Bruce Kison (14-8) L: Steve Renko (7-11) S: Jim Rooker (1) | Second | 5 out |
| » Lost to |
