| Wednesday, April 4 |
| » Major-league debuts: Mark Clear (Angels) |
| Friday, April 6 |
| » Lost to Cardinals (1-0), 8-1 | Busch Stadium II (0-1) | 0-1 | |
| » W: John Denny (1-0) L: Steve Carlton (0-1) | Second | 1 out |
| Saturday, April 7 |
| » Lost to Cardinals (2-0), 3-2 | Busch Stadium II (0-2) | 0-2 | Lost 2 |
| » W: Pete Vuckovich (1-0) L: Ron Reed (0-1) | Third | 2 out |
| Sunday, April 8 |
| » Tied Cardinals, 2-2 | Busch Stadium II (0-2) | 0-2 | |
| » Starters: Nino Espinosa vs Bob Forsch | Fourth | 2 out |
| Tuesday, April 10 |
| » Defeated Pirates (1-3), 7-3 | Veteran's Stadium (1-0) | 1-2 | |
| » W: Dick Ruthven (1-0) L: Enrique Romo (0-2) | Fourth | 2 out |
| Wednesday, April 11 |
| » Defeated Pirates (1-4), 5-4 | Veteran's Stadium (2-0) | 2-2 | Won 2 |
| » W: Steve Carlton (1-1) L: Bert Blyleven (0-1) | Third | 1½ out |
| Thursday, April 12 |
| » Lost to Mets (3-2), 3-2 | Shea Stadium (0-1) | 2-3 | |
| » W: Pat Zachry (2-0) L: Randy Lerch (0-1) | Fourth | 2 out |
| Sunday, April 15 |
| » Defeated Mets (3-3), 3-2 | Shea Stadium (1-1) | 3-3 | |
| » W: Dick Ruthven (2-0) L: Craig Swan (1-1) S: Tug McGraw (1) | Second | 1 out |
| » Defeated Mets (3-4), 6-3 | Shea Stadium (2-1) | 4-3 | Won 2 |
| » W: Nino Espinosa (1-0) L: Neil Allen (0-1) S: Ron Reed (1) | Second | 1 out |
| » Major-league debuts: Neil Allen (Mets) |
| Tuesday, April 17 |
| » Defeated Pirates (4-6), 13-2 | Three Rivers Stadium (1-0) | 5-3 | Won 3 |
| » W: Steve Carlton (2-1) L: Bert Blyleven (0-2) | Second | 1½ out |
| Wednesday, April 18 |
| » Defeated Pirates (4-7), 3-2 | Three Rivers Stadium (2-0) | 6-3 | Won 4 |
| » W: Randy Lerch (1-1) L: Don Robinson (1-1) | Second | 1½ out |
| Friday, April 20 |
| » Defeated Mets (3-7), 8-0 | Veteran's Stadium (3-0) | 7-3 | Won 5 |
| » W: Dick Ruthven (3-0) L: Craig Swan (1-2) | Second | ½ out |
| Saturday, April 21 |
| » Defeated Mets (3-8), 3-0 | Veteran's Stadium (4-0) | 8-3 | Won 6 |
| » W: Nino Espinosa (2-0) L: Neil Allen (0-2) S: Tug McGraw (2) | First | -- |
| Sunday, April 22 |
| » Lost to Mets (4-8), 4-2 | Veteran's Stadium (4-1) | 8-4 | |
| » W: Jesse Orosco (1-0) L: Steve Carlton (2-2) S: Skip Lockwood (2) | First | -- |
| Monday, April 23 |
| » Defeated Dodgers (8-10), 4-3 | Veteran's Stadium (5-1) | 9-4 | |
| » W: Tug McGraw (1-0) L: Lance Rautzhan (0-2) | First | -- |
| Future Phillie Carlos Silva is born in Bolivar, Venezuela. |
| Tuesday, April 24 |
| » Defeated Dodgers (8-11), 7-6 | Veteran's Stadium (6-1) | 10-4 | Won 2 |
| » W: Ron Reed (1-1) L: Jerry Reuss (1-2) | First | -- |
| Wednesday, April 25 |
| » Defeated Dodgers (8-12), 5-4 | Veteran's Stadium (7-1) | 11-4 | Won 3 |
| » W: Ron Reed (2-1) L: Rick Sutcliffe (1-1) | First | -- |
| Friday, April 27 |
| » Defeated Padres (8-12), 2-0 | Veteran's Stadium (8-1) | 12-4 | Won 4 |
| » W: Nino Espinosa (3-0) L: Gaylord Perry (2-1) | First | -- |
| Saturday, April 28 |
| » Lost to Padres (9-12), 5-0 | Veteran's Stadium (8-2) | 12-5 | |
| » W: John D'Acquisto (2-1) L: Steve Carlton (2-3) | First | -- |
| Sunday, April 29 |
| » Defeated Padres (9-13), 4-3 | Veteran's Stadium (9-2) | 13-5 | |
| » W: Ron Reed (3-1) L: Rollie Fingers (1-2) | First | -- |
| Monday, April 30 |
| » Defeated Giants (9-14), 4-1 | Veteran's Stadium (10-2) | 14-5 | Won 2 |
| » W: Dick Ruthven (4-0) L: Philip Nastu (0-1) S: Tug McGraw (3) | First | -- |
| Tuesday, May 1 |
| » Lost to Giants (10-14), 7-0 | Veteran's Stadium (10-3) | 14-6 | |
| » W: Bob Knepper (2-2) L: Nino Espinosa (3-1) | Second | 1 out |
| Thursday, May 3 |
| » Lost to Dodgers (11-15), 5-2 | Dodger Stadium (0-1) | 14-7 | Lost 2 |
| » W: Rick Sutcliffe (2-2) L: Steve Carlton (2-4) | Second | 1 out |
| Friday, May 4 |
| » Defeated Dodgers (11-16), 5-2 | Dodger Stadium (1-1) | 15-7 | |
| » W: Randy Lerch (2-1) L: Don Sutton (3-3) | Second | 1 out |
| Saturday, May 5 |
| » Defeated Dodgers (11-17), 11-0 | Dodger Stadium (2-1) | 16-7 | Won 2 |
| » W: Dick Ruthven (5-0) L: Andy Messersmith (1-2) | First | -- |
| Sunday, May 6 |
| » Defeated Dodgers (11-18), 4-0 | Dodger Stadium (3-1) | 17-7 | Won 3 |
| » W: Nino Espinosa (4-1) L: Doug Rau (0-4) | First | -- |
| Monday, May 7 |
| » Defeated Padres (12-17), 11-6 | San Diego/Jack Murphy Stadium (1-0) | 18-7 | Won 4 |
| » W: Steve Carlton (3-4) L: Bob Owchinko (0-1) S: Rawly Eastwick (1) | First | -- |
| Tuesday, May 8 |
| » Defeated Padres (12-18), 9-8 | San Diego/Jack Murphy Stadium (2-0) | 19-7 | Won 5 |
| » W: Jim Kaat (1-0) L: John D'Acquisto (2-3) | First | -- |
| Wednesday, May 9 |
| » Defeated Padres (12-19), 2-0 | San Diego/Jack Murphy Stadium (3-0) | 20-7 | Won 6 |
| » W: Dick Ruthven (6-0) L: Eric Rasmussen (0-3) | First | -- |
| Thursday, May 10 |
| » Defeated Padres (12-20), 3-2 | San Diego/Jack Murphy Stadium (4-0) | 21-7 | Won 7 |
| » W: Nino Espinosa (5-1) L: Gaylord Perry (3-3) S: Ron Reed (2) | First | -- |
| Friday, May 11 |
| » Lost to Giants (15-17), 2-1 | Candlestick Park (0-1) | 21-8 | |
| » W: Bob Knepper (3-2) L: Steve Carlton (3-5) S: Gary Lavelle (4) | First | -- |
| Saturday, May 12 |
| » Lost to Giants (16-17), 4-1 | Candlestick Park (0-2) | 21-9 | Lost 2 |
| » W: Ed Halicki (3-3) L: Randy Lerch (2-2) | First | -- |
| Sunday, May 13 |
| » Defeated Giants (16-18), 12-3 | Candlestick Park (1-2) | 22-9 | |
| » W: Ron Reed (4-1) L: Vida Blue (6-3) | First | -- |
| Tuesday, May 15 |
| » Lost to Cubs (16-14), 7-1 | Wrigley Field (0-1) | 22-10 | |
| » W: Lynn McGlothen (5-4) L: Nino Espinosa (5-2) | First | -- |
| Wednesday, May 16 |
| » Defeated Cubs (16-15), 13-0 | Wrigley Field (1-1) | 23-10 | |
| » W: Steve Carlton (4-5) L: Rick Reuschel (2-5) | First | -- |
| Thursday, May 17 |
| » Defeated Cubs (16-16), 23-22 | Wrigley Field (2-1) | 24-10 | Won 2 |
| » W: Rawly Eastwick (1-0) L: Bruce Sutter (1-1) | First | -- |
| Friday, May 18 |
| » Lost to Expos (21-13), 5-3 | Veteran's Stadium (10-4) | 24-11 | |
| » W: Stan Bahnsen (1-1) L: Dick Ruthven (6-1) S: Elias Sosa (4) | First | -- |
| Saturday, May 19 |
| » Lost to Expos (22-13), 10-5 | Veteran's Stadium (10-5) | 24-12 | Lost 2 |
| » W: Rudy May (2-0) L: Rawly Eastwick (1-1) S: Dan Schatzeder (1) | First | -- |
| Sunday, May 20 |
| » Lost to Expos (23-13), 10-6 | Veteran's Stadium (10-6) | 24-13 | Lost 3 |
| » W: Stan Bahnsen (2-1) L: Nino Espinosa (5-3) S: Elias Sosa (5) | First | -- |
| Monday, May 21 |
| » Defeated Cardinals (20-17), 5-3 | Veteran's Stadium (11-6) | 25-13 | |
| » W: Steve Carlton (5-5) L: John Denny (3-3) | First | -- |
| Tuesday, May 22 |
| » Defeated Cardinals (20-18), 3-1 | Veteran's Stadium (12-6) | 26-13 | Won 2 |
| » W: Tug McGraw (2-0) L: Bob Forsch (1-4) | First | -- |
| Wednesday, May 23 |
| » Lost to Cardinals (21-18), 3-1 | Veteran's Stadium (12-7) | 26-14 | |
| » W: Silvio Martinez (2-1) L: Dick Ruthven (6-2) S: Mark Littell (3) | First | -- |
| Friday, May 25 |
| » Lost to Cubs (18-21), 3-0 | Veteran's Stadium (12-8) | 26-15 | Lost 2 |
| » W: Lynn McGlothen (6-5) L: Nino Espinosa (5-4) S: Bruce Sutter (8) | Second | 1 out |
| Saturday, May 26 |
| » Lost to Cubs (19-21), 4-1 | Veteran's Stadium (12-9) | 26-16 | Lost 3 |
| » W: Dennis Lamp (4-1) L: Larry Christenson (0-1) S: Dick Tidrow (3) | Second | 1½ out |
| Sunday, May 27 |
| » Defeated Cubs (19-22), 6-4 | Veteran's Stadium (13-9) | 27-16 | |
| » W: Steve Carlton (6-5) L: Bill Caudill (0-1) | Second | 1 out |
| Monday, May 28 |
| » Lost to Cubs (20-22), 4-1 | Veteran's Stadium (13-10) | 27-17 | |
| » W: Dick Tidrow (3-1) L: Randy Lerch (2-3) S: Bruce Sutter (9) | Second | 1½ out |
| Tuesday, May 29 |
| » Lost to Expos (27-15), 9-0 | Stade Olympique (0-1) | 27-18 | Lost 2 |
| » W: Steve Rogers (5-2) L: Dick Ruthven (6-3) | Second | 1½ out |
| Wednesday, May 30 |
| » Lost to Expos (28-15), 2-0 | Stade Olympique (0-2) | 27-19 | Lost 3 |
| » W: Bill Lee (5-2) L: Nino Espinosa (5-5) | Second | 2½ out |
| Thursday, May 31 |
| » Lost to Expos (29-15), 1-0 | Stade Olympique (0-3) | 27-20 | Lost 4 |
| » W: Scott Sanderson (4-3) L: Larry Christenson (0-2) | Second | 3½ out |
| Friday, June 1 |
| » Lost to Reds (27-23), 4-2 | Riverfront Stadium (0-1) | 27-21 | Lost 5 |
| » W: Doug Bair (3-0) L: Steve Carlton (6-6) S: Pedro Borbon (2) | Second | 3½ out |
| Saturday, June 2 |
| » Lost to Reds (28-23), 4-2 | Riverfront Stadium (0-2) | 27-22 | Lost 6 |
| » W: Mike LaCoss (6-0) L: Randy Lerch (2-4) S: Doug Bair (7) | Third | 3½ out |
| Sunday, June 3 |
| » Defeated Reds (28-24), 6-4 | Riverfront Stadium (1-2) | 28-22 | |
| » W: Ron Reed (5-1) L: Pedro Borbon (2-2) S: Tug McGraw (4) | Third | 3 out |
| » Lost to Reds (29-24), 12-2 | Riverfront Stadium (1-3) | 28-23 | |
| » W: Tom Hume (4-4) L: Jim Lonborg (0-1) | Third | 3 out |
| Monday, June 4 |
| » Lost to Astros (33-23), 3-0 | Astrodome (0-1) | 28-24 | Lost 2 |
| » W: Randy Niemann (2-0) L: Larry Christenson (0-3) | Third | 4 out |
| Tuesday, June 5 |
| » Defeated Astros (33-24), 8-0 | Astrodome (1-1) | 29-24 | |
| » W: Steve Carlton (7-6) L: Rick Williams (2-2) | Third | 3 out |
| Wednesday, June 6 |
| » Lost to Astros (34-24), 4-3 | Astrodome (1-2) | 29-25 | |
| » W: Joe Sambito (3-2) L: Ron Reed (5-2) S: Bert Roberge (2) | Fourth | 4 out |
| Friday, June 8 |
| » Lost to Braves (21-35), 11-5 | Veteran's Stadium (13-11) | 29-26 | Lost 2 |
| » W: Gene Garber (3-7) L: Ron Reed (5-3) | Fourth | 4 out |
| Saturday, June 9 |
| » Defeated Braves (21-36), 9-3 | Veteran's Stadium (14-11) | 30-26 | |
| » W: Larry Christenson (1-3) L: Mickey Mahler (2-6) | Fourth | 3 out |
| Sunday, June 10 |
| » Lost to Braves (22-36), 10-3 | Veteran's Stadium (14-12) | 30-27 | |
| » W: Phil Niekro (7-9) L: Steve Carlton (7-7) | Third | 3 out |
| Monday, June 11 |
| » Defeated Astros (36-26), 4-2 | Veteran's Stadium (15-12) | 31-27 | |
| » W: Randy Lerch (3-4) L: J.R. Richard (6-5) | Second | 3 out |
| Tuesday, June 12 |
| » Defeated Astros (36-27), 4-0 | Veteran's Stadium (16-12) | 32-27 | Won 2 |
| » W: Nino Espinosa (6-5) L: Rick Williams (2-3) | Third | 2½ out |
| Wednesday, June 13 |
| » Lost to Astros (37-27), 4-3 | Veteran's Stadium (16-13) | 32-28 | |
| » W: Joe Niekro (10-2) L: Dick Ruthven (6-4) | Third | 3½ out |
| Friday, June 15 |
| » Lost to Reds (35-28), 6-3 | Veteran's Stadium (16-14) | 32-29 | Lost 2 |
| » W: Tom Seaver (4-5) L: Larry Christenson (1-4) | Third | 4 out |
| Saturday, June 16 |
| » Defeated Reds (35-29), 4-3 | Veteran's Stadium (17-14) | 33-29 | |
| » W: Tug McGraw (3-0) L: Doug Bair (3-1) | Third | 4 out |
| Sunday, June 17 |
| » Defeated Reds (35-30), 9-3 | Veteran's Stadium (18-14) | 34-29 | Won 2 |
| » W: Randy Lerch (4-4) L: Doug Bair (3-2) | Third | 4 out |
| Monday, June 18 |
| » Lost to Braves (23-42), 10-5 | Atlanta-Fulton County Stadium (0-1) | 34-30 | |
| » W: Rick Matula (4-5) L: Nino Espinosa (6-6) | Third | 4 out |
| Tuesday, June 19 |
| » Lost to Braves (24-42), 10-4 | Atlanta-Fulton County Stadium (0-2) | 34-31 | Lost 2 |
| » W: Phil Niekro (8-9) L: Larry Christenson (1-5) | Fourth | 5 out |
| Wednesday, June 20 |
| » Defeated Braves (24-43), 10-4 | Atlanta-Fulton County Stadium (1-2) | 35-31 | |
| » W: Steve Carlton (8-7) L: Eddie Solomon (3-3) | Fourth | 5 out |
| Friday, June 22 |
| » Lost to Expos (39-24), 6-5 | Stade Olympique (0-4) | 35-32 | |
| » W: Ross Grimsley (7-4) L: Randy Lerch (4-5) S: Elias Sosa (7) | Fourth | 6 out |
| Saturday, June 23 |
| » Lost to Expos (40-24), 3-0 | Stade Olympique (0-5) | 35-33 | Lost 2 |
| » W: Steve Rogers (7-4) L: Nino Espinosa (6-7) | Fourth | 7 out |
| Sunday, June 24 |
| » Defeated Expos (40-25), 5-2 | Stade Olympique (1-5) | 36-33 | |
| » W: Larry Christenson (2-5) L: Bill Lee (7-4) S: Tug McGraw (5) | Fourth | 6 out |
| Monday, June 25 |
| » Lost to Cubs (35-31), 8-2 | Wrigley Field (2-2) | 36-34 | |
| » W: Lynn McGlothen (8-6) L: Steve Carlton (8-8) | Fourth | 7 out |
| Tuesday, June 26 |
| » Defeated Cubs (35-32), 5-3 | Wrigley Field (3-2) | 37-34 | |
| » W: Dick Ruthven (7-4) L: Donnie Moore (1-3) S: Tug McGraw (6) | Fourth | 7 out |
| Wednesday, June 27 |
| » Lost to Cubs (36-32), 11-4 | Wrigley Field (3-3) | 37-35 | |
| » W: Mike Krukow (5-5) L: Randy Lerch (4-6) | Fourth | 7 out |
| Friday, June 29 |
| » Defeated Cardinals (35-33), 8-7 | Busch Stadium II (1-2) | 38-35 | |
| » W: Kevin Saucier (1-0) L: Bob Forsch (3-8) S: Tug McGraw (7) | Fifth | 6½ out |
| » Lost to Cardinals (36-33), 7-1 | Busch Stadium II (1-3) | 38-36 | |
| » W: Pete Vuckovich (7-4) L: Larry Christenson (2-6) | Fifth | 6½ out |
| Saturday, June 30 |
| » Defeated Cardinals (36-34), 6-4 | Busch Stadium II (2-3) | 39-36 | |
| » W: Ron Reed (6-3) L: George Frazier (0-1) S: Tug McGraw (8) | Fourth | 6½ out |
| Sunday, July 1 |
| » Lost to Cardinals (37-34), 13-7 | Busch Stadium II (2-4) | 39-37 | |
| » W: Mark Littell (5-2) L: Tug McGraw (3-1) | Fifth | 7½ out |
| » Lost to Cardinals (38-34), 2-1 | Busch Stadium II (2-5) | 39-38 | Lost 2 |
| » W: Mark Littell (6-2) L: Randy Lerch (4-7) | Fifth | 7½ out |
| Monday, July 2 |
| » Defeated Mets (31-42), 6-2 | Veteran's Stadium (19-14) | 40-38 | |
| » W: Nino Espinosa (7-7) L: Dock Ellis (1-6) | Fourth | 7½ out |
| Tuesday, July 3 |
| » Defeated Mets (31-43), 4-2 | Veteran's Stadium (20-14) | 41-38 | Won 2 |
| » W: Warren Brusstar (1-0) L: Wayne Twitchell (3-2) S: Tug McGraw (9) | Third | 6½ out |
| Wednesday, July 4 |
| » Defeated Mets (31-44), 1-0 | Veteran's Stadium (21-14) | 42-38 | Won 3 |
| » W: Steve Carlton (9-8) L: Andy Hassler (2-4) | Fourth | 6½ out |
| Thursday, July 5 |
| » Lost to Mets (32-44), 3-2 | Veteran's Stadium (21-15) | 42-39 | |
| » W: Craig Swan (8-6) L: Dickie Noles (0-1) | Third | 6½ out |
| » Major-league debuts: Dickie Noles (Phillies) |
| Friday, July 6 |
| » Defeated Giants (40-43), 6-1 | Veteran's Stadium (22-15) | 43-39 | |
| » W: Nino Espinosa (8-7) L: John Curtis (4-5) | Fourth | 6½ out |
| Saturday, July 7 |
| » Lost to Giants (41-43), 8-6 | Veteran's Stadium (22-16) | 43-40 | |
| » W: Pedro Borbon (4-2) L: Ron Reed (6-4) | Fifth | 7½ out |
| Sunday, July 8 |
| » Defeated Giants (41-44), 5-3 | Veteran's Stadium (23-16) | 44-40 | |
| » W: Steve Carlton (10-8) L: Bob Knepper (6-3) | Third | 6½ out |
| Monday, July 9 |
| » Defeated Giants (41-45), 4-2 | Veteran's Stadium (24-16) | 45-40 | Won 2 |
| » W: Dickie Noles (1-1) L: Vida Blue (7-7) S: Warren Brusstar (1) | Third | 6½ out |
| Tuesday, July 10 |
| » Defeated Padres (40-50), 6-5 | Veteran's Stadium (25-16) | 46-40 | Won 3 |
| » W: Doug Bird (1-0) L: Rollie Fingers (7-6) | Third | 5½ out |
| Wednesday, July 11 |
| » Lost to Padres (41-50), 7-3 | Veteran's Stadium (25-17) | 46-41 | |
| » W: John D'Acquisto (6-5) L: Randy Lerch (4-8) | Fourth | 5½ out |
| Thursday, July 12 |
| » Defeated Padres (41-51), 4-3 | Veteran's Stadium (26-17) | 47-41 | |
| » W: Steve Carlton (11-8) L: Rollie Fingers (7-7) S: Tug McGraw (10) | Fourth | 4½ out |
| Friday, July 13 |
| » Defeated Dodgers (36-55), 3-2 | Veteran's Stadium (27-17) | 48-41 | Won 2 |
| » W: Dickie Noles (2-1) L: Rick Sutcliffe (8-8) S: Tug McGraw (11) | Third | 4 out |
| Saturday, July 14 |
| » Defeated Dodgers (36-56), 10-7 | Veteran's Stadium (28-17) | 49-41 | Won 3 |
| » W: Nino Espinosa (9-7) L: Don Sutton (7-11) S: Tug McGraw (12) | Third | 3 out |
| Sunday, July 15 |
| » Defeated Dodgers (36-57), 10-3 | Veteran's Stadium (29-17) | 50-41 | Won 4 |
| » W: Randy Lerch (5-8) L: Bob Welch (4-6) S: Rawly Eastwick (2) | Third | 3 out |
| Thursday, July 19 |
| » Lost to Giants (46-48), 1-0 | Candlestick Park (1-3) | 50-42 | |
| » W: John Curtis (6-5) L: Dickie Noles (2-2) | Third | 3 out |
| Friday, July 20 |
| » Defeated Giants (46-49), 6-4 | Candlestick Park (2-3) | 51-42 | |
| » W: Randy Lerch (6-8) L: Tom Griffin (4-5) S: Ron Reed (3) | Third | 3 out |
| Saturday, July 21 |
| » Lost to Giants (47-49), 4-1 | Candlestick Park (2-4) | 51-43 | |
| » W: Bob Knepper (7-4) L: Steve Carlton (11-9) | Third | 3 out |
| Sunday, July 22 |
| » Defeated Padres (45-55), 5-2 | San Diego/Jack Murphy Stadium (5-0) | 52-43 | |
| » W: Nino Espinosa (10-7) L: John D'Acquisto (6-7) S: Tug McGraw (13) | Fourth | 2½ out |
| Monday, July 23 |
| » Lost to Padres (46-55), 6-5 | San Diego/Jack Murphy Stadium (5-1) | 52-44 | |
| » W: Rollie Fingers (8-7) L: Ron Reed (6-5) | Fourth | 3½ out |
| Tuesday, July 24 |
| » Lost to Dodgers (41-58), 15-3 | Dodger Stadium (3-2) | 52-45 | Lost 2 |
| » W: Burt Hooton (9-7) L: Randy Lerch (6-9) | Fourth | 3½ out |
| Wednesday, July 25 |
| » Lost to Dodgers (42-58), 16-8 | Dodger Stadium (3-3) | 52-46 | Lost 3 |
| » W: Rick Sutcliffe (9-8) L: Dick Ruthven (7-5) | Fourth | 4½ out |
| Friday, July 27 |
| » Lost to Cardinals (48-47), 5-0 | Veteran's Stadium (29-18) | 52-47 | Lost 4 |
| » W: Bob Forsch (4-9) L: Nino Espinosa (10-8) | Fourth | 4 out |
| Saturday, July 28 |
| » Lost to Cardinals (49-47), 5-4 | Veteran's Stadium (29-19) | 52-48 | Lost 5 |
| » W: Mark Littell (7-3) L: Ron Reed (6-6) | Fourth | 4½ out |
| Sunday, July 29 |
| » Lost to Cardinals (50-47), 6-5 | Veteran's Stadium (29-20) | 52-49 | Lost 6 |
| » W: Pete Vuckovich (10-7) L: Randy Lerch (6-10) | Fourth | 5 out |
| Monday, July 30 |
| » Defeated Cubs (54-45), 5-4 | Veteran's Stadium (30-20) | 53-49 | |
| » W: Ron Reed (7-6) L: Bruce Sutter (4-3) | Fourth | 4½ out |
| Tuesday, July 31 |
| » Defeated Cubs (54-46), 4-1 | Veteran's Stadium (31-20) | 54-49 | Won 2 |
| » W: Nino Espinosa (11-8) L: Mike Krukow (8-6) | Fourth | 4½ out |
| Wednesday, August 1 |
| » Defeated Mets (44-57), 9-6 | Shea Stadium (3-1) | 55-49 | Won 3 |
| » W: Dickie Noles (3-2) L: Dock Ellis (2-9) S: Rawly Eastwick (3) | Fourth | 4½ out |
| Thursday, August 2 |
| » Defeated Mets (44-58), 7-4 | Shea Stadium (4-1) | 56-49 | Won 4 |
| » W: Ron Reed (8-6) L: Andy Hassler (4-5) | Fourth | 5 out |
| » Lost to Mets (45-58), 2-1 | Shea Stadium (4-2) | 56-50 | |
| » W: Pete Falcone (3-7) L: Kevin Saucier (1-1) S: Neil Allen (2) | Fourth | 5 out |
| Friday, August 3 |
| » Lost to Pirates (59-46), 6-3 | Three Rivers Stadium (2-1) | 56-51 | Lost 2 |
| » W: Enrique Romo (7-3) L: Tug McGraw (3-2) | Fourth | 6½ out |
| » Lost to Pirates (60-46), 5-1 | Three Rivers Stadium (2-2) | 56-52 | Lost 3 |
| » W: Jim Bibby (8-2) L: Larry Christenson (2-7) | Fourth | 6½ out |
| Saturday, August 4 |
| » Lost to Pirates (61-46), 4-0 | Three Rivers Stadium (2-3) | 56-53 | Lost 4 |
| » W: John Candelaria (10-7) L: Nino Espinosa (11-9) | Fourth | 6½ out |
| Sunday, August 5 |
| » Lost to Pirates (62-46), 12-8 | Three Rivers Stadium (2-4) | 56-54 | Lost 5 |
| » W: Kent Tekulve (5-6) L: Rawly Eastwick (1-2) | Fourth | 8 out |
| » Lost to Pirates (63-46), 5-2 | Three Rivers Stadium (2-5) | 56-55 | Lost 6 |
| » W: Enrique Romo (8-3) L: Dickie Noles (3-3) S: Kent Tekulve (20) | Fourth | 8 out |
| Tuesday, August 7 |
| » Defeated Expos (61-46), 4-2 | Veteran's Stadium (32-20) | 57-55 | |
| » W: Larry Christenson (3-7) L: Scott Sanderson (7-7) | Fourth | 7 out |
| Former Phillie Hal Wagner dies in Riverside, NJ at the age of 65. |
| Wednesday, August 8 |
| » Defeated Expos (61-47), 4-3 | Veteran's Stadium (33-20) | 58-55 | Won 2 |
| » W: Ron Reed (9-6) L: Elias Sosa (5-7) | Fifth | 7 out |
| Thursday, August 9 |
| » Defeated Expos (61-48), 6-4 | Veteran's Stadium (34-20) | 59-55 | Won 3 |
| » W: Nino Espinosa (12-9) L: Bill Lee (10-9) S: Rawly Eastwick (4) | Fourth | 6 out |
| Friday, August 10 |
| » Defeated Pirates (64-49), 4-3 | Veteran's Stadium (35-20) | 60-55 | Won 4 |
| » W: Rawly Eastwick (2-2) L: Grant Jackson (6-4) | Fifth | 6 out |
| » Lost to Pirates (65-49), 3-2 | Veteran's Stadium (35-21) | 60-56 | |
| » W: Bruce Kison (7-6) L: Randy Lerch (6-11) S: Kent Tekulve (21) | Fifth | 6 out |
| Saturday, August 11 |
| » Lost to Pirates (66-49), 14-11 | Veteran's Stadium (35-22) | 60-57 | Lost 2 |
| » W: Enrique Romo (9-3) L: Rawly Eastwick (2-3) S: Kent Tekulve (22) | Fifth | 7 out |
| Monday, August 13 |
| » Lost to Pirates (67-49), 9-1 | Veteran's Stadium (35-23) | 60-58 | Lost 3 |
| » W: Jim Bibby (9-2) L: Larry Christenson (3-8) | Fifth | 8 out |
| Tuesday, August 14 |
| » Lost to Reds (66-55), 2-1 | Riverfront Stadium (1-4) | 60-59 | Lost 4 |
| » W: Tom Hume (7-6) L: Steve Carlton (11-10) | Fifth | 9 out |
| Former Phillie Mack Wheat dies in Los Banos, CA at the age of 87. |
| Wednesday, August 15 |
| » Defeated Reds (66-56), 3-2 | Riverfront Stadium (2-4) | 61-59 | |
| » W: Nino Espinosa (13-9) L: Fred Norman (10-9) | Fifth | 9 out |
| Friday, August 17 |
| » Defeated Astros (70-52), 5-2 | Astrodome (2-2) | 62-59 | Won 2 |
| » W: Randy Lerch (7-11) L: Frank LaCorte (1-1) | Fifth | 8½ out |
| » Major-league debuts: Pete Ladd (Astros) |
| Saturday, August 18 |
| » Defeated Astros (70-53), 1-0 | Astrodome (3-2) | 63-59 | Won 3 |
| » W: Larry Christenson (4-8) L: J.R. Richard (12-12) S: Ron Reed (4) | Fifth | 7½ out |
| Sunday, August 19 |
| » Defeated Astros (70-54), 3-2 | Astrodome (4-2) | 64-59 | Won 4 |
| » W: Steve Carlton (12-10) L: Joaquin Andujar (12-9) | Fifth | 7½ out |
| Monday, August 20 |
| » Lost to Braves (48-78), 5-2 | Veteran's Stadium (35-24) | 64-60 | |
| » W: Phil Niekro (16-16) L: Ron Reed (9-7) S: Gene Garber (20) | Fifth | 8½ out |
| Tuesday, August 21 |
| » Lost to Braves (49-78), 5-4 | Veteran's Stadium (35-25) | 64-61 | Lost 2 |
| » W: Larry Bradford (1-0) L: Rawly Eastwick (2-4) S: Gene Garber (21) | Fifth | 8½ out |
| Wednesday, August 22 |
| » Lost to Braves (50-78), 4-3 | Veteran's Stadium (35-26) | 64-62 | Lost 3 |
| » W: Eddie Solomon (5-10) L: Larry Christenson (4-9) S: Gene Garber (22) | Fifth | 9½ out |
| Friday, August 24 |
| » Defeated Astros (72-56), 5-3 | Veteran's Stadium (36-26) | 65-62 | |
| » W: Steve Carlton (13-10) L: Joaquin Andujar (12-10) | Fifth | 8½ out |
| Saturday, August 25 |
| » Lost to Astros (73-56), 3-1 | Veteran's Stadium (36-27) | 65-63 | |
| » W: Joe Niekro (18-7) L: Nino Espinosa (13-10) S: Joe Sambito (16) | Fifth | 9½ out |
| Sunday, August 26 |
| » Lost to Astros (74-56), 4-1 | Veteran's Stadium (36-28) | 65-64 | Lost 2 |
| » W: Pete Ladd (1-0) L: Kevin Saucier (1-2) S: Joe Sambito (17) | Fifth | 10½ out |
| Monday, August 27 |
| » Lost to Reds (75-57), 4-2 | Veteran's Stadium (36-29) | 65-65 | Lost 3 |
| » W: Tom Hume (9-6) L: Larry Christenson (4-10) | Fifth | 10½ out |
| Tuesday, August 28 |
| » Lost to Reds (76-57), 5-2 | Veteran's Stadium (36-30) | 65-66 | Lost 4 |
| » W: Frank Pastore (3-6) L: Steve Carlton (13-11) S: Tom Hume (11) | Fifth | 11½ out |
| Wednesday, August 29 |
| » Lost to Reds (77-57), 7-6 | Veteran's Stadium (36-31) | 65-67 | Lost 5 |
| » W: Mario Soto (2-2) L: Kevin Saucier (1-3) S: Doug Bair (16) | Fifth | 12½ out |
| Friday, August 31 |
| » Defeated Braves (53-80), 6-2 | Atlanta-Fulton County Stadium (2-2) | 66-67 | |
| » Manager: Dallas Green |
| » W: Doug Bird (2-0) L: Tony Brizzolara (6-9) | Fifth | 12½ out |
| Saturday, September 1 |
| » Defeated Braves (53-81), 6-4 | Atlanta-Fulton County Stadium (3-2) | 67-67 | Won 2 |
| » W: Larry Christenson (5-10) L: Phil Niekro (17-18) S: Ron Reed (5) | Fourth | 13 out |
| Sunday, September 2 |
| » Defeated Braves (53-82), 2-1 | Atlanta-Fulton County Stadium (4-2) | 68-67 | Won 3 |
| » W: Ron Reed (10-7) L: Joey McLaughlin (4-3) | Fifth | 13 out |
| Monday, September 3 |
| » Defeated Pirates (81-55), 2-0 | Three Rivers Stadium (3-5) | 69-67 | Won 4 |
| » W: Steve Carlton (14-11) L: Bert Blyleven (11-5) S: Tug McGraw (14) | Fifth | 13 out |
| » Lost to Pirates (82-55), 7-3 | Three Rivers Stadium (3-6) | 69-68 | |
| » W: Jim Rooker (3-6) L: Randy Lerch (7-12) S: Kent Tekulve (25) | Fifth | 13 out |
| Thursday, September 6 |
| » Lost to Mets (54-82), 5-3 | Veteran's Stadium (36-32) | 69-69 | Lost 2 |
| » W: Ed Glynn (1-2) L: Nino Espinosa (13-11) S: Andy Hassler (2) | Fifth | 13 out |
| » Defeated Mets (54-83), 2-1 | Veteran's Stadium (37-32) | 70-69 | |
| » W: Randy Lerch (8-12) L: Pete Falcone (5-12) S: Rawly Eastwick (5) | Fifth | 13 out |
| Friday, September 7 |
| » Lost to Cubs (72-66), 4-3 | Wrigley Field (3-4) | 70-70 | |
| » W: Dennis Lamp (11-8) L: Tug McGraw (3-3) | Fifth | 14 out |
| Saturday, September 8 |
| » Defeated Cubs (72-67), 9-8 | Wrigley Field (4-4) | 71-70 | |
| » W: Rawly Eastwick (3-4) L: Bruce Sutter (4-5) | Fifth | 13 out |
| » Major-league debuts: John Poff (Phillies) |
| Former Phillie Rick Joseph dies in Santiago, D.R. at the age of 41. |
| Sunday, September 9 |
| » Lost to Cubs (73-67), 15-2 | Wrigley Field (4-5) | 71-71 | |
| » W: Rick Reuschel (17-9) L: Kevin Saucier (1-4) | Fifth | 14 out |
| Tuesday, September 11 |
| » Defeated Mets (55-86), 5-2 | Shea Stadium (5-2) | 72-71 | |
| » W: Nino Espinosa (14-11) L: Pete Falcone (5-13) S: Rawly Eastwick (6) | Fifth | 14 out |
| Wednesday, September 12 |
| » Defeated Mets (55-87), 4-0 | Shea Stadium (6-2) | 73-71 | Won 2 |
| » W: Randy Lerch (9-12) L: Craig Swan (12-12) | Fifth | 14 out |
| Thursday, September 13 |
| » Defeated Mets (55-88), 2-1 | Shea Stadium (7-2) | 74-71 | Won 3 |
| » W: Steve Carlton (15-11) L: Juan Berenguer (0-1) S: Tug McGraw (15) | Fourth | 13½ out |
| Friday, September 14 |
| » Lost to Cubs (74-71), 2-0 | Veteran's Stadium (37-33) | 74-72 | |
| » W: Bruce Sutter (5-6) L: Ron Reed (10-8) | Fifth | 14 out |
| Saturday, September 15 |
| » Defeated Cubs (74-72), 8-1 | Veteran's Stadium (38-33) | 75-72 | |
| » W: Dan Larson (1-0) L: Lynn McGlothen (11-13) | Fourth | 14 out |
| » Major-league debuts: George Riley (Cubs) |
| Sunday, September 16 |
| » Defeated Cubs (74-73), 4-3 | Veteran's Stadium (39-33) | 76-72 | Won 2 |
| » W: Ron Reed (11-8) L: Dick Tidrow (12-5) | Fourth | 13 out |
| Monday, September 17 |
| » Defeated Cardinals (78-69), 7-5 | Busch Stadium II (3-5) | 77-72 | Won 3 |
| » W: Steve Carlton (16-11) L: Darold Knowles (2-5) S: Tug McGraw (16) | Fourth | 13 out |
| Tuesday, September 18 |
| » Defeated Cardinals (78-70), 5-3 | Busch Stadium II (4-5 |