| Monday, January 1 |
| Former Pirate Carmen Hill dies in Indianapolis, IN at the age of 95. |
| Saturday, February 3 |
| Former Pirate Erv Kantlehner dies in Santa Barbara, CA at the age of 98. |
| Thursday, March 29 |
| Former Pirate Phil Masi dies in Mt.Prospect, IL at the age of 75. |
| Monday, April 9 |
| » Defeated Mets (0-1), 12-3 | Shea Stadium (1-0) | 1-0 | |
| » W: Doug Drabek (1-0) L: Dwight Gooden (0-1) | First | -- |
| » Major-league debuts: Scott Ruskin (Pirates) |
| Wednesday, April 11 |
| » Lost to Mets (1-1), 3-0 | Shea Stadium (1-1) | 1-1 | |
| » W: Frank Viola (1-0) L: John Smiley (0-1) S: John Franco (1) | Third | ½ out |
| Thursday, April 12 |
| » Defeated Mets (1-2), 6-2 | Shea Stadium (2-1) | 2-1 | |
| » W: Neal Heaton (1-0) L: Sid Fernandez (0-1) | First | -- |
| Friday, April 13 |
| » Lost to Cubs (3-1), 2-0 | Three Rivers Stadium (0-1) | 2-2 | |
| » W: Greg Maddux (1-0) L: Bob Walk (0-1) S: Mitch Williams (3) | Second | 1 out |
| Saturday, April 14 |
| » Lost to Cubs (4-1), 4-1 | Three Rivers Stadium (0-2) | 2-3 | Lost 2 |
| » W: Mike Harkey (1-0) L: Doug Drabek (1-1) S: Mitch Williams (4) | Third | 2 out |
| Sunday, April 15 |
| » Defeated Cubs (4-2), 4-3 | Three Rivers Stadium (1-2) | 3-3 | |
| » W: Bob Patterson (1-0) L: Les Lancaster (1-1) | Second | 1 out |
| Monday, April 16 |
| » Lost to Cardinals (4-3), 6-4 | Three Rivers Stadium (1-3) | 3-4 | |
| » W: Jose DeLeon (1-0) L: John Smiley (0-2) S: Ricky Horton (1) | Second | 1 out |
| Tuesday, April 17 |
| » Defeated Cardinals (4-4), 7-2 | Three Rivers Stadium (2-3) | 4-4 | |
| » W: Neal Heaton (2-0) L: Greg Mathews (0-2) | Second | 1 out |
| Wednesday, April 18 |
| » Lost to Cardinals (5-4), 3-0 | Three Rivers Stadium (2-4) | 4-5 | |
| » W: John Tudor (2-0) L: Bob Walk (0-2) S: Ken Dayley (1) | Third | 2 out |
| Thursday, April 19 |
| » Defeated Cardinals (5-5), 5-1 | Busch Stadium II (1-0) | 5-5 | |
| » W: Doug Drabek (2-1) L: Joe Magrane (0-2) | Second | 1 out |
| Friday, April 20 |
| » Defeated Cubs (6-5), 9-4 | Wrigley Field (1-0) | 6-5 | Won 2 |
| » W: Mike Roesler (1-0) L: Mike Bielecki (0-1) | Second | 1 out |
| Saturday, April 21 |
| » Defeated Cubs (6-6), 4-3 | Wrigley Field (2-0) | 7-5 | Won 3 |
| » W: John Smiley (1-2) L: Steve Wilson (0-3) S: Bill Landrum (1) | First | -- |
| Sunday, April 22 |
| » Defeated Cubs (6-7), 3-2 | Wrigley Field (3-0) | 8-5 | Won 4 |
| » W: Neal Heaton (3-0) L: Jose Nunez (1-1) S: Ted Power (1) | First | -- |
| Monday, April 23 |
| » Lost to Cardinals (6-8), 7-4 | Busch Stadium II (1-1) | 8-6 | |
| » W: John Tudor (3-0) L: Bob Walk (0-3) | First | -- |
| Tuesday, April 24 |
| » Defeated Giants (5-9), 4-1 | Candlestick Park (1-0) | 9-6 | |
| » W: Doug Drabek (3-1) L: Scott Garrelts (0-1) S: Bill Landrum (2) | First | -- |
| Wednesday, April 25 |
| » Defeated Giants (5-10), 7-4 | Candlestick Park (2-0) | 10-6 | Won 2 |
| » W: Bob Patterson (2-0) L: Steve Bedrosian (0-2) | First | -- |
| Thursday, April 26 |
| » Defeated Giants (5-11), 2-1 | Candlestick Park (3-0) | 11-6 | Won 3 |
| » W: John Smiley (2-2) L: Mike LaCoss (3-1) | First | -- |
| Friday, April 27 |
| » Defeated Padres (9-8), 9-4 | San Diego/Jack Murphy Stadium (1-0) | 12-6 | Won 4 |
| » W: Neal Heaton (4-0) L: Eric Show (0-3) | First | -- |
| Saturday, April 28 |
| » Defeated Padres (9-9), 4-3 | San Diego/Jack Murphy Stadium (2-0) | 13-6 | Won 5 |
| » W: Bob Walk (1-3) L: Andy Benes (2-2) S: Bill Landrum (3) | First | -- |
| Sunday, April 29 |
| » Defeated Padres (9-10), 10-1 | San Diego/Jack Murphy Stadium (3-0) | 14-6 | Won 6 |
| » W: Doug Drabek (4-1) L: Dennis Rasmussen (1-1) | First | -- |
| Former Pirate Ray Poat dies in Oak Lawn, IL at the age of 73. |
| Tuesday, May 1 |
| » Lost to Dodgers (12-10), 4-1 | Dodger Stadium (0-1) | 14-7 | |
| » W: Tim Belcher (2-2) L: Walt Terrell (0-1) | First | -- |
| Wednesday, May 2 |
| » Lost to Dodgers (13-10), 6-2 | Dodger Stadium (0-2) | 14-8 | Lost 2 |
| » W: Fernando Valenzuela (2-2) L: John Smiley (2-3) | First | -- |
| Sunday, May 6 |
| » Defeated Braves (7-14), 6-4 | Three Rivers Stadium (3-4) | 15-8 | |
| » W: Neal Heaton (5-0) L: John Smoltz (1-3) S: Scott Ruskin (1) | First | -- |
| » Defeated Braves (7-15), 4-2 | Three Rivers Stadium (4-4) | 16-8 | Won 2 |
| » W: Doug Drabek (5-1) L: Derek Lilliquist (1-4) S: Bob Patterson (1) | First | -- |
| Monday, May 7 |
| » Defeated Padres (12-13), 4-1 | Three Rivers Stadium (5-4) | 17-8 | Won 3 |
| » W: Bob Walk (2-3) L: Bruce Hurst (1-4) S: Ted Power (2) | First | -- |
| Tuesday, May 8 |
| » Defeated Padres (12-14), 10-2 | Three Rivers Stadium (6-4) | 18-8 | Won 4 |
| » W: Walt Terrell (1-1) L: Eric Show (0-4) | First | -- |
| Wednesday, May 9 |
| » Defeated Reds (18-6), 6-2 | Three Rivers Stadium (7-4) | 19-8 | Won 5 |
| » W: John Smiley (3-3) L: Jack Armstrong (5-1) S: Bill Landrum (4) | First | -- |
| Thursday, May 10 |
| » Lost to Reds (19-6), 10-4 | Three Rivers Stadium (7-5) | 19-9 | |
| » W: Norm Charlton (1-0) L: Ted Power (0-1) | First | -- |
| Friday, May 11 |
| » Defeated Astros (12-17), 4-3 | Three Rivers Stadium (8-5) | 20-9 | |
| » W: Doug Drabek (6-1) L: Jim Deshaies (1-1) S: Bill Landrum (5) | First | -- |
| Saturday, May 12 |
| » Defeated Astros (12-18), 3-1 | Three Rivers Stadium (9-5) | 21-9 | Won 2 |
| » W: Neal Heaton (6-0) L: Mark Portugal (1-4) S: Ted Power (3) | First | -- |
| Sunday, May 13 |
| » Defeated Astros (12-19), 5-1 | Three Rivers Stadium (10-5) | 22-9 | Won 3 |
| » W: Bob Walk (3-3) L: Bill Gullickson (2-2) S: Bill Landrum (6) | First | -- |
| Monday, May 14 |
| » Lost to Reds (22-7), 5-3 | Riverfront Stadium (0-1) | 22-10 | |
| » W: Jack Armstrong (6-1) L: Walt Terrell (1-2) S: Randy Myers (7) | First | -- |
| Tuesday, May 15 |
| » Lost to Reds (23-7), 5-4 | Riverfront Stadium (0-2) | 22-11 | Lost 2 |
| » W: Tim Layana (3-0) L: Bob Patterson (2-1) | First | -- |
| Thursday, May 17 |
| » Lost to Braves (12-20), 6-1 | Atlanta-Fulton County Stadium (0-1) | 22-12 | Lost 3 |
| » W: Derek Lilliquist (2-4) L: Neal Heaton (6-1) S: Joe Hesketh (1) | First | -- |
| Friday, May 18 |
| » Defeated Braves (12-21), 9-3 | Atlanta-Fulton County Stadium (1-1) | 23-12 | |
| » W: Bob Walk (4-3) L: Marty Clary (1-2) | First | -- |
| Saturday, May 19 |
| » Lost to Braves (13-21), 2-1 | Atlanta-Fulton County Stadium (1-2) | 23-13 | |
| » W: Tom Glavine (2-2) L: Walt Terrell (1-3) S: Joe Hesketh (2) | First | -- |
| Sunday, May 20 |
| » Lost to Braves (14-21), 13-11 | Atlanta-Fulton County Stadium (1-3) | 23-14 | Lost 2 |
| » W: Pete Smith (3-3) L: Bob Kipper (0-1) S: Joe Boever (5) | First | -- |
| Monday, May 21 |
| » Lost to Astros (14-24), 3-2 | Astrodome (0-1) | 23-15 | Lost 3 |
| » W: Juan Agosto (2-1) L: Ted Power (0-2) | First | -- |
| Tuesday, May 22 |
| » Defeated Astros (14-25), 8-4 | Astrodome (1-1) | 24-15 | |
| » W: Neal Heaton (7-1) L: Dan Schatzeder (1-2) | First | -- |
| » Major-league debuts: Jeff Baldwin (Astros) |
| Wednesday, May 23 |
| » Lost to Astros (15-25), 7-3 | Astrodome (1-2) | 24-16 | |
| » W: Juan Agosto (3-1) L: Scott Ruskin (0-1) | First | -- |
| Friday, May 25 |
| » Lost to Giants (17-25), 9-8 | Three Rivers Stadium (10-6) | 24-17 | Lost 2 |
| » W: John Burkett (3-1) L: Walt Terrell (1-4) S: Jeff Brantley (4) | Second | ½ out |
| Saturday, May 26 |
| » Defeated Giants (17-26), 10-4 | Three Rivers Stadium (11-6) | 25-17 | |
| » W: Doug Drabek (7-1) L: Scott Garrelts (1-5) | First | -- |
| Sunday, May 27 |
| » Defeated Giants (17-27), 5-2 | Three Rivers Stadium (12-6) | 26-17 | Won 2 |
| » W: Neal Heaton (8-1) L: Rick Reuschel (2-6) S: Ted Power (4) | First | -- |
| Monday, May 28 |
| » Defeated Dodgers (24-21), 6-5 | Three Rivers Stadium (13-6) | 27-17 | Won 3 |
| » W: Bill Landrum (1-0) L: Jay Howell (1-3) | First | -- |
| Tuesday, May 29 |
| » Defeated Dodgers (24-22), 9-5 | Three Rivers Stadium (14-6) | 28-17 | Won 4 |
| » W: Bob Patterson (3-1) L: Fernando Valenzuela (4-4) S: Scott Ruskin (2) | First | -- |
| Wednesday, May 30 |
| » Defeated Dodgers (24-23), 5-3 | Three Rivers Stadium (15-6) | 29-17 | Won 5 |
| » W: Walt Terrell (2-4) L: Ramon Martinez (5-3) S: Bill Landrum (7) | First | -- |
| Friday, June 1 |
| » Lost to Expos (26-21), 4-1 | Three Rivers Stadium (15-7) | 29-18 | |
| » W: Kevin Gross (7-3) L: Doug Drabek (7-2) S: Dale Mohorcic (1) | First | -- |
| Saturday, June 2 |
| » Defeated Expos (26-22), 4-3 | Three Rivers Stadium (16-7) | 30-18 | |
| » W: Bill Landrum (2-0) L: Drew Hall (3-6) | First | -- |
| Sunday, June 3 |
| » Lost to Expos (27-22), 4-3 | Three Rivers Stadium (16-8) | 30-19 | |
| » W: Bill Sampen (3-0) L: Stan Belinda (0-1) S: Dave Schmidt (1) | First | -- |
| Monday, June 4 |
| » Defeated Cubs (22-29), 6-2 | Three Rivers Stadium (17-8) | 31-19 | |
| » W: Bob Patterson (4-1) L: Shawn Boskie (1-3) S: Bill Landrum (8) | First | -- |
| Tuesday, June 5 |
| » Defeated Cubs (22-30), 6-5 | Three Rivers Stadium (18-8) | 32-19 | Won 2 |
| » W: Stan Belinda (1-1) L: Mitch Williams (0-5) | First | -- |
| Wednesday, June 6 |
| » Defeated Cubs (22-31), 6-1 | Three Rivers Stadium (19-8) | 33-19 | Won 3 |
| » W: Doug Drabek (8-2) L: Greg Maddux (4-6) | First | -- |
| Thursday, June 7 |
| » Defeated Mets (23-27), 5-4 | Shea Stadium (3-1) | 34-19 | Won 4 |
| » W: Scott Ruskin (1-1) L: Jeff Musselman (0-1) S: Bob Kipper (1) | First | -- |
| Friday, June 8 |
| » Lost to Mets (24-27), 7-1 | Shea Stadium (3-2) | 34-20 | |
| » W: Sid Fernandez (4-5) L: Bob Walk (4-4) | First | -- |
| Saturday, June 9 |
| » Lost to Mets (25-27), 9-3 | Shea Stadium (3-3) | 34-21 | Lost 2 |
| » W: David Cone (2-4) L: Bob Patterson (4-2) | First | -- |
| Sunday, June 10 |
| » Lost to Mets (26-27), 8-3 | Shea Stadium (3-4) | 34-22 | Lost 3 |
| » W: Bob Ojeda (2-3) L: Walt Terrell (2-5) | First | -- |
| Monday, June 11 |
| » Defeated Cardinals (25-33), 8-7 | Busch Stadium II (2-1) | 35-22 | |
| » W: Stan Belinda (2-1) L: Tom Niedenfuer (0-1) S: Bill Landrum (9) | First | -- |
| Tuesday, June 12 |
| » Defeated Cardinals (25-34), 6-3 | Busch Stadium II (3-1) | 36-22 | Won 2 |
| » W: Neal Heaton (9-1) L: Jose DeLeon (5-5) S: Bill Landrum (10) | First | -- |
| Wednesday, June 13 |
| » Defeated Cardinals (25-35), 6-5 | Busch Stadium II (4-1) | 37-22 | Won 3 |
| » W: Mark Huismann (1-0) L: Frank DiPino (3-1) S: Rick Reed (1) | First | -- |
| Friday, June 15 |
| » Lost to Mets (30-28), 7-5 | Three Rivers Stadium (19-9) | 37-23 | |
| » W: Bob Ojeda (3-3) L: Walt Terrell (2-6) S: John Franco (10) | First | -- |
| Saturday, June 16 |
| » Defeated Mets (30-29), 11-6 | Three Rivers Stadium (20-9) | 38-23 | |
| » W: Bob Kipper (1-1) L: Frank Viola (9-3) | First | -- |
| Sunday, June 17 |
| » Lost to Mets (31-29), 4-3 | Three Rivers Stadium (20-10) | 38-24 | |
| » W: Dwight Gooden (5-5) L: Neal Heaton (9-2) S: John Franco (11) | First | -- |
| Tuesday, June 19 |
| » Lost to Phillies (33-30), 2-1 | Veteran's Stadium (0-1) | 38-25 | Lost 2 |
| » W: Don Carman (4-0) L: Bill Landrum (2-1) | First | -- |
| Wednesday, June 20 |
| » Lost to Phillies (34-30), 7-2 | Veteran's Stadium (0-2) | 38-26 | Lost 3 |
| » W: Bruce Ruffin (5-6) L: Bob Patterson (4-3) | First | -- |
| Friday, June 22 |
| » Lost to Expos (39-29), 4-3 | Stade Olympique (0-1) | 38-27 | Lost 4 |
| » W: Bill Sampen (6-0) L: Stan Belinda (2-2) S: Dave Schmidt (9) | First | -- |
| Saturday, June 23 |
| » Lost to Expos (40-29), 6-1 | Stade Olympique (0-2) | 38-28 | Lost 5 |
| » W: Zane Smith (4-5) L: Doug Drabek (8-3) | Second | 1½ out |
| Sunday, June 24 |
| » Defeated Expos (40-30), 5-3 | Stade Olympique (1-2) | 39-28 | |
| » W: Neal Heaton (10-2) L: Dennis Martinez (5-5) S: Stan Belinda (1) | First | -- |
| Monday, June 25 |
| » Defeated Phillies (34-34), 5-0 | Three Rivers Stadium (21-10) | 40-28 | Won 2 |
| » W: Rick Reed (1-0) L: Jose DeJesus (0-1) | First | -- |
| Tuesday, June 26 |
| » Defeated Phillies (34-35), 1-0 | Three Rivers Stadium (22-10) | 41-28 | Won 3 |
| » W: Scott Ruskin (2-1) L: Bruce Ruffin (5-7) S: Stan Belinda (2) | First | -- |
| Wednesday, June 27 |
| » Defeated Phillies (34-36), 5-3 | Three Rivers Stadium (23-10) | 42-28 | Won 4 |
| » W: Bob Kipper (2-1) L: Ken Howell (8-5) S: Bill Landrum (11) | First | -- |
| » Major-league debuts: Orlando Merced (Pirates) |
| Thursday, June 28 |
| » Lost to Cardinals (30-43), 5-1 | Busch Stadium II (4-2) | 42-29 | |
| » W: Bob Tewksbury (3-0) L: Doug Drabek (8-4) S: Lee Smith (12) | First | -- |
| Friday, June 29 |
| » Lost to Giants (38-36), 7-3 | Candlestick Park (3-1) | 42-30 | Lost 2 |
| » W: Trevor Wilson (4-0) L: Neal Heaton (10-3) S: Jeff Brantley (10) | Second | 1 out |
| Saturday, June 30 |
| » Defeated Giants (38-37), 4-3 | Candlestick Park (4-1) | 43-30 | |
| » W: Bob Kipper (3-1) L: Mark Thurmond (1-2) S: Stan Belinda (3) | First | -- |
| Sunday, July 1 |
| » Defeated Giants (38-38), 8-5 | Candlestick Park (5-1) | 44-30 | Won 2 |
| » W: Jay Tibbs (3-7) L: Francisco Oliveras (0-2) S: Bill Landrum (12) | First | -- |
| Monday, July 2 |
| » Defeated Padres (35-39), 4-3 | San Diego/Jack Murphy Stadium (4-0) | 45-30 | Won 3 |
| » W: Bob Patterson (5-3) L: Calvin Schiraldi (2-1) | First | -- |
| Tuesday, July 3 |
| » Defeated Padres (35-40), 5-3 | San Diego/Jack Murphy Stadium (5-0) | 46-30 | Won 4 |
| » W: Bill Landrum (3-1) L: Craig Lefferts (5-4) | First | -- |
| » Major-league debuts: Thomas Howard (Padres) |
| Wednesday, July 4 |
| » Lost to Padres (36-40), 5-4 | San Diego/Jack Murphy Stadium (5-1) | 46-31 | |
| » W: Eric Show (1-6) L: Neal Heaton (10-4) S: Greg Harris (5) | First | -- |
| Thursday, July 5 |
| » Defeated Dodgers (38-41), 9-6 | Dodger Stadium (1-2) | 47-31 | |
| » W: Rick Reed (2-0) L: Ramon Martinez (9-4) S: Bob Patterson (2) | First | -- |
| Friday, July 6 |
| » Defeated Dodgers (38-42), 6-3 | Dodger Stadium (2-2) | 48-31 | Won 2 |
| » W: John Smiley (4-3) L: Mike Morgan (7-7) | First | -- |
| Saturday, July 7 |
| » Lost to Dodgers (39-42), 4-2 | Dodger Stadium (2-3) | 48-32 | |
| » W: Tim Belcher (7-6) L: Walt Terrell (2-7) | First | -- |
| Sunday, July 8 |
| » Defeated Dodgers (39-43), 7-2 | Dodger Stadium (3-3) | 49-32 | |
| » W: Doug Drabek (9-4) L: Terry Wells (0-1) | First | -- |
| Thursday, July 12 |
| » Defeated Padres (37-44), 4-3 | Three Rivers Stadium (24-10) | 50-32 | Won 2 |
| » W: Bob Patterson (6-3) L: Calvin Schiraldi (2-2) | First | -- |
| Friday, July 13 |
| » Defeated Padres (37-45), 4-1 | Three Rivers Stadium (25-10) | 51-32 | Won 3 |
| » W: Doug Drabek (10-4) L: Dennis Rasmussen (7-6) S: Stan Belinda (4) | First | -- |
| Saturday, July 14 |
| » Defeated Padres (37-46), 8-4 | Three Rivers Stadium (26-10) | 52-32 | Won 4 |
| » W: Ted Power (1-2) L: Greg Harris (4-4) | First | -- |
| Sunday, July 15 |
| » Lost to Padres (38-46), 4-1 | Three Rivers Stadium (26-11) | 52-33 | |
| » W: Ed Whitson (7-6) L: Neal Heaton (10-5) S: Craig Lefferts (12) | First | -- |
| Monday, July 16 |
| » Lost to Giants (48-40), 6-1 | Three Rivers Stadium (26-12) | 52-34 | Lost 2 |
| » W: Scott Garrelts (7-7) L: Rick Reed (2-1) | First | -- |
| Tuesday, July 17 |
| » Lost to Giants (49-40), 6-3 | Three Rivers Stadium (26-13) | 52-35 | Lost 3 |
| » W: Don Robinson (6-1) L: John Smiley (4-4) | First | -- |
| Wednesday, July 18 |
| » Defeated Giants (49-41), 11-2 | Three Rivers Stadium (27-13) | 53-35 | |
| » W: Doug Drabek (11-4) L: Trevor Wilson (6-2) | First | -- |
| Friday, July 20 |
| » Defeated Dodgers (44-46), 4-2 | Three Rivers Stadium (28-13) | 54-35 | Won 2 |
| » W: Bob Walk (5-4) L: Mike Morgan (8-8) S: Ted Power (5) | First | -- |
| Saturday, July 21 |
| » Lost to Dodgers (45-46), 6-0 | Three Rivers Stadium (28-14) | 54-36 | |
| » W: Tim Belcher (8-7) L: Neal Heaton (10-6) | First | -- |
| Sunday, July 22 |
| » Defeated Dodgers (45-47), 11-6 | Three Rivers Stadium (29-14) | 55-36 | |
| » W: Bob Kipper (4-1) L: Terry Wells (1-2) | First | -- |
| Monday, July 23 |
| » Lost to Expos (52-44), 5-0 | Stade Olympique (1-3) | 55-37 | |
| » W: Dennis Martinez (7-7) L: John Smiley (4-5) | First | -- |
| Tuesday, July 24 |
| » Defeated Expos (52-45), 5-3 | Stade Olympique (2-3) | 56-37 | |
| » W: Doug Drabek (12-4) L: Kevin Gross (8-7) S: Stan Belinda (5) | First | -- |
| Wednesday, July 25 |
| » Lost to Expos (53-45), 8-7 | Stade Olympique (2-4) | 56-38 | |
| » W: Bill Sampen (8-2) L: Stan Belinda (2-3) | First | -- |
| Thursday, July 26 |
| » Lost to Phillies (47-48), 12-4 | Three Rivers Stadium (29-15) | 56-39 | Lost 2 |
| » W: Terry Mulholland (5-4) L: Neal Heaton (10-7) | First | -- |
| Friday, July 27 |
| » Lost to Phillies (48-48), 5-3 | Three Rivers Stadium (29-16) | 56-40 | Lost 3 |
| » W: Dennis Cook (7-2) L: Rick Reed (2-2) S: Joe Boever (9) | Second | 1 out |
| Saturday, July 28 |
| » Lost to Phillies (49-48), 4-3 | Three Rivers Stadium (29-17) | 56-41 | Lost 4 |
| » W: Jeff Parrett (4-9) L: Bill Landrum (3-2) S: Joe Boever (10) | Second | 1 out |
| Sunday, July 29 |
| » Defeated Phillies (49-49), 2-1 | Three Rivers Stadium (30-17) | 57-41 | |
| » W: Doug Drabek (13-4) L: Pat Combs (6-8) | Second | 1 out |
| Tuesday, July 31 |
| » Defeated Cubs (47-56), 9-1 | Wrigley Field (4-0) | 58-41 | Won 2 |
| » W: Bob Patterson (7-3) L: Shawn Boskie (4-6) | First | -- |
| Wednesday, August 1 |
| » Lost to Cubs (48-56), 5-0 | Wrigley Field (4-1) | 58-42 | |
| » W: Greg Maddux (8-9) L: Rick Reed (2-3) | Second | 1 out |
| Thursday, August 2 |
| » Defeated Cubs (48-57), 8-5 | Wrigley Field (5-1) | 59-42 | |
| » W: John Smiley (5-5) L: Steve Wilson (3-7) S: Bob Walk (1) | Second | 1 out |
| Friday, August 3 |
| » Defeated Phillies (50-52), 11-0 | Veteran's Stadium (1-2) | 60-42 | Won 2 |
| » W: Doug Drabek (14-4) L: Bruce Ruffin (6-11) | Second | 1 out |
| Saturday, August 4 |
| » Defeated Phillies (50-53), 3-1 | Veteran's Stadium (2-2) | 61-42 | Won 3 |
| » W: Bob Patterson (8-3) L: Roger McDowell (3-5) S: Ted Power (6) | First | -- |
| Sunday, August 5 |
| » Lost to Phillies (51-53), 8-6 | Veteran's Stadium (2-3) | 61-43 | |
| » W: Don Carman (5-0) L: Scott Ruskin (2-2) S: Joe Boever (11) | First | -- |
| Monday, August 6 |
| » Defeated Phillies (51-54), 10-1 | Veteran's Stadium (3-3) | 62-43 | |
| » W: Randy Tomlin (1-0) L: Terry Mulholland (6-5) | First | -- |
| » Defeated Phillies (51-55), 4-3 | Veteran's Stadium (4-3) | 63-43 | Won 2 |
| » W: Bill Landrum (4-2) L: Roger McDowell (3-6) | First | -- |
| » Major-league debuts: Randy Tomlin (Pirates) |
| Tuesday, August 7 |
| » Defeated Expos (55-54), 4-3 | Three Rivers Stadium (31-17) | 64-43 | Won 3 |
| » W: Mark Ross (1-0) L: Dale Mohorcic (1-2) | First | -- |
| Wednesday, August 8 |
| » Lost to Expos (56-54), 6-2 | Three Rivers Stadium (31-18) | 64-44 | |
| » W: Dennis Martinez (8-8) L: Doug Drabek (14-5) | First | -- |
| Thursday, August 9 |
| » Lost to Expos (57-54), 7-6 | Three Rivers Stadium (31-19) | 64-45 | Lost 2 |
| » W: Steve Frey (5-1) L: Bill Landrum (4-3) S: Bill Sampen (2) | First | -- |
| Friday, August 10 |
| » Lost to Cardinals (52-61), 8-3 | Three Rivers Stadium (31-20) | 64-46 | Lost 3 |
| » W: Ken Dayley (3-2) L: Randy Kramer (0-1) | Second | ½ out |
| Former Pirate Cookie Lavagetto dies in Orinda, CA at the age of 78. |
| Saturday, August 11 |
| » Lost to Cardinals (53-61), 3-2 | Three Rivers Stadium (31-21) | 64-47 | Lost 4 |
| » W: Joe Magrane (8-12) L: Randy Tomlin (1-1) S: Lee Smith (25) | Second | ½ out |
| Sunday, August 12 |
| » Lost to Cardinals (54-61), 6-0 | Three Rivers Stadium (31-22) | 64-48 | Lost 5 |
| » W: Bob Tewksbury (7-3) L: John Smiley (5-6) | Second | ½ out |
| Monday, August 13 |
| » Major-league debuts: Dave Walsh (Dodgers) |
| Tuesday, August 14 |
| » Defeated Braves (43-71), 3-1 | Three Rivers Stadium (32-22) | 65-48 | |
| » W: Doug Drabek (15-5) L: Charlie Leibrandt (4-7) | First | -- |
| » Defeated Braves (43-72), 6-4 | Three Rivers Stadium (33-22) | 66-48 | Won 2 |
| » W: Zane Smith (7-7) L: Steve Avery (2-7) S: Bob Patterson (3) | First | -- |
| Wednesday, August 15 |
| » Lost to Braves (44-72), 8-1 | Three Rivers Stadium (33-23) | 66-49 | |
| » W: Tony Castillo (3-1) L: Neal Heaton (10-8) | First | -- |
| Thursday, August 16 |
| » Defeated Braves (44-73), 4-3 | Three Rivers Stadium (34-23) | 67-49 | |
| » W: Bob Kipper (5-1) L: Kent Mercker (4-2) | First | -- |
| Friday, August 17 |
| » Defeated Reds (68-48), 7-1 | Riverfront Stadium (1-2) | 68-49 | Won 2 |
| » W: Mike York (1-0) L: Jose Rijo (8-6) | First | -- |
| » Defeated Reds (68-49), 4-3 | Riverfront Stadium (2-2) | 69-49 | Won 3 |
| » W: John Smiley (6-6) L: Tim Layana (5-1) S: Stan Belinda (6) | First | -- |
| » Major-league debuts: Mike York (Pirates) |
| Saturday, August 18 |
| » Defeated Reds (68-50), 3-1 | Riverfront Stadium (3-2) | 70-49 | Won 4 |
| » W: Zane Smith (8-7) L: Chris Hammond (0-1) S: Bob Kipper (2) | First | -- |
| Sunday, August 19 |
| » Defeated Reds (68-51), 6-3 | Riverfront Stadium (4-2) | 71-49 | Won 5 |
| » W: Doug Drabek (16-5) L: Jack Armstrong (12-9) S: Stan Belinda (7) | First | -- |
| Monday, August 20 |
| » Defeated Astros (53-69), 7-1 | Three Rivers Stadium (35-23) | 72-49 | Won 6 |
| » W: Neal Heaton (11-8) L: Jim Deshaies (5-11) | First | -- |
| Tuesday, August 21 |
| » Lost to Astros (54-69), 2-1 | Three Rivers Stadium (35-24) | 72-50 | |
| » W: Danny Darwin (9-1) L: Bob Patterson (8-4) | First | -- |
| Wednesday, August 22 |
| » Defeated Astros (54-70), 4-2 | Three Rivers Stadium (36-24) | 73-50 | |
| » W: John Smiley (7-6) L: Bill Gullickson (8-11) S: Bill Landrum (13) | First | -- |
| Thursday, August 23 |
| » Defeated Reds (70-53), 9-3 | Three Rivers Stadium (37-24) | 74-50 | Won 2 |
| » W: Zane Smith (9-7) L: Chris Hammond (0-2) | First | -- |
| Friday, August 24 |
| » Lost to Reds (71-53), 4-3 | Three Rivers Stadium (37-25) | 74-51 | |
| » W: Rob Dibble (6-3) L: Bob Kipper (5-2) S: Randy Myers (25) | First | -- |
| Saturday, August 25 |
| » Lost to Reds (72-53), 6-1 | Three Rivers Stadium (37-26) | 74-52 | Lost 2 |
| » W: Norm Charlton (10-7) L: Stan Belinda (2-4) | First | -- |
| Sunday, August 26 |
| » Lost to Reds (73-53), 6-2 | Three Rivers Stadium (37-27) | 74-53 | Lost 3 |
| » W: Rick Mahler (6-5) L: Randy Tomlin (1-2) S: Rob Dibble (9) | First | -- |
| Tuesday, August 28 |
| » Lost to Braves (50-78), 9-0 | Atlanta-Fulton County Stadium (1-4) | 74-54 | Lost 4 |
| » W: Charlie Leibrandt (6-8) L: John Smiley (7-7) | First | -- |
| Wednesday, August 29 |
| » Defeated Braves (50-79), 10-0 | Atlanta-Fulton County Stadium (2-4) | 75-54 | |
| » W: Doug Drabek (17-5) L: Steve Avery (3-8) | First | -- |
| Friday, August 31 |
| » Lost to Astros (59-72), 3-2 | Astrodome (1-3) | 75-55 | |
| » W: Juan Agosto (6-7) L: Bob Patterson (8-5) | First | -- |
| Saturday, September 1 |
| » Lost to Astros (60-72), 2-1 | Astrodome (1-4) | 75-56 | Lost 2 |
| » W: Dave Smith (5-5) L: Ted Power (1-3) | Second | ½ out |
| Sunday, September 2 |
| » Defeated Astros (60-73), 7-6 | Astrodome (2-4) | 76-56 | |
| » W: John Smiley (8-7) L: Danny Darwin (10-2) S: Bob Kipper (3) | Second | ½ out |
| » Major-league debuts: Andujar Cedeno and Al Osuna (Astros) |
| Monday, September 3 |
| » Defeated Phillies (62-71), 4-1 | Three Rivers Stadium (38-27) | 77-56 | Won 2 |
| » W: Doug Drabek (18-5) L: Bruce Ruffin (6-12) | Second | ½ out |
| Tuesday, September 4 |
| » Defeated Phillies (62-72), 11-7 | Three Rivers Stadium (39-27) | 78-56 | Won 3 |
| » W: Bill Landrum (5-3) L: Darrel Akerfelds (5-2) S: Bob Patterson (4) | First | -- |
| Wednesday, September 5 |
| » Defeated Mets (77-57), 1-0 | Three Rivers Stadium (40-27) | 79-56 | Won 4 |
| » W: Zane Smith (10-7) L: John Franco (4-1) | First | -- |
| » Defeated Mets (77-58), 3-1 | Three Rivers Stadium (41-27) | 80-56 | Won 5 |
| » W: Neal Heaton (12-8) L: Bob Ojeda (7-6) S: Ted Power (7) | First | -- |
| Thursday, September 6 |
| » Defeated Mets (77-59), 7-1 | Three Rivers Stadium (42-27) | 81-56 | Won 6 |
| » W: Randy Tomlin (2-2) L: Julio Valera (1-1) | First | -- |
| Friday, September 7 |
| » Lost to Expos (72-65), 4-1 | Three Rivers Stadium (42-28) | 81-57 | |
| » W: Oil Can Boyd (9-5) L: John Smiley (8-8) S: Tim Burke (17) | First | -- |
| Saturday, September 8 |
| » Defeated Expos (72-66), 6-1 | Three Rivers Stadium (43-28) | 82-57 | |
| » W: Doug Drabek (19-5) L: Howard Farmer (0-2) | First | -- |
| Sunday, September 9 |
| » Lost to Expos (73-66), 9-5 | Three Rivers Stadium (43-29) | 82-58 | |
| » W: Mel Rojas (2-1) L: Bob Walk (5-5) | First | -- |
| Monday, September 10 |
| » Defeated Phillies (65-75), 3-2 | Veteran's Stadium (5-3) | 83-58 | |
| » W: Stan Belinda (3-4) L: Joe Boever (3-6) | First | -- |
| Tuesday, September 11 |
| » Defeated Phillies (65-76), 5-1 | Veteran's Stadium (6-3) | 84-58 | Won 2 |
| » W: Randy Tomlin (3-2) L: Jason Grimsley (1-2) | First | -- |
| Wednesday, September 12 |
| » Lost to Mets (81-61), 2-1 | Shea Stadium (3-5) | 84-59 | |
| » W: David Cone (12-8) L: John Smiley (8-9) | First | -- |
| Thursday, September 13 |
| » Lost to Mets (82-61), 6-3 | Shea Stadium (3-6) | 84-60 | Lost 2 |
| » W: Dwight Gooden (17-6) L: Doug Drabek (19-6) S: John Franco (32) | First | -- |
| Friday, September 14 |
| » Lost to Expos (76-68), 4-2 | Stade Olympique (2-5) | 84-61 | Lost 3 |
| » W: Steve Frey (8-2) L: Neal Heaton (12-9) | First | -- |
| » Major-league debuts: Brian Barnes (Expos) |
| Saturday, September 15 |
| » Lost to Expos (77-68), 4-3 | Stade Olympique (2-6) | 84-62 | Lost 4 |
| » W: Bill Sampen (11-6) L: Zane Smith (10-8) S: Tim Burke (19) | First | < |
