| Wednesday, January 6 |
| Future Pirate Chuck Workman is born in Leeton, MO. |
| Friday, January 8 |
| Future Pirate Walker Cooper is born in Atherton, MO. |
| Friday, February 26 |
| Future Pirate Preacher Roe is born in Ash Flat, AR. |
| Monday, March 1 |
| Future Pirate Nick Strincevich is born in Gary, IN. |
| Thursday, April 8 |
| Future Pirate Kirby Higbe is born in Columbia, SC. |
| Wednesday, April 14 |
| » Defeated Reds (0-1), 9-2 | Crosley Field (1-0) | 1-0 | |
| » Starters: George McQuillan vs Red Ames | First | -- |
| Thursday, April 15 |
| » Lost to Reds (1-1), 2-1 | Crosley Field (1-1) | 1-1 | |
| » Starters: Bob Harmon vs Rube Benton | Second | 1 out |
| Friday, April 16 |
| » Lost to Reds (2-1), 4-2 | Crosley Field (1-2) | 1-2 | Lost 2 |
| » Starters: Dazzy Vance vs Phil Douglas | Third | 1½ out |
| » Major-league debuts: Dazzy Vance (Pirates) |
| Saturday, April 17 |
| » Defeated Reds (2-2), 3-2 | Crosley Field (2-2) | 2-2 | |
| » Starters: Babe Adams vs Curly Brown | Second | 1½ out |
| Sunday, April 18 |
| » Lost to Cubs (3-2), 2-1 | West Side Grounds (0-1) | 2-3 | |
| » Starters: George McQuillan vs Hippo Vaughn | Fourth | 2 out |
| » Major-league debuts: Doug Baird (Pirates) |
| Monday, April 19 |
| » Lost to Cubs (4-2), 8-7 | West Side Grounds (0-2) | 2-4 | Lost 2 |
| » Starters: Erv Kantlehner vs Pete Standridge | Fifth | 3 out |
| Tuesday, April 20 |
| » Defeated Cubs (4-3), 8-6 | West Side Grounds (1-2) | 3-4 | |
| » Starters: Al Mamaux vs Larry Cheney | Fifth | 3 out |
| Thursday, April 22 |
| » Defeated Reds (6-3), 8-2 | Forbes Field (1-0) | 4-4 | Won 2 |
| » Starters: Phil Douglas vs Babe Adams | Third | 3½ out |
| Friday, April 23 |
| » Lost to Reds (7-3), 2-1 | Forbes Field (1-1) | 4-5 | |
| » Starters: Pete Schneider vs Wilbur Cooper | Fourth | 4½ out |
| Saturday, April 24 |
| » Tied Reds, 1-1 | Forbes Field (1-1) | 4-5 | |
| » Starters: King Lear vs George McQuillan | Fourth | 4 out |
| Sunday, April 25 |
| » Lost to Cardinals (5-7), 8-1 | Robison Field (0-1) | 4-6 | Lost 2 |
| » Starters: Erv Kantlehner vs Bill Doak | Fifth | 4½ out |
| Monday, April 26 |
| » Lost to Cardinals (6-7), 3-0 | Robison Field (0-2) | 4-7 | Lost 3 |
| » Starters: Babe Adams vs Hub Perdue | Fifth | 5½ out |
| Tuesday, April 27 |
| » Lost to Cardinals (7-7), 3-0 | Robison Field (0-3) | 4-8 | Lost 4 |
| » Starters: Al Mamaux vs Dan Griner | Fifth | 6½ out |
| Wednesday, April 28 |
| » Defeated Cardinals (7-8), 7-6 | Robison Field (1-3) | 5-8 | |
| » Starters: Bob Harmon vs Slim Sallee | Sixth | 6½ out |
| Friday, April 30 |
| » Lost to Cubs (8-6), 4-1 | Forbes Field (1-2) | 5-9 | |
| » Starters: Zip Zabel vs Wilbur Cooper | Seventh | 6 out |
| Saturday, May 1 |
| » Lost to Cubs (9-6), 3-1 | Forbes Field (1-3) | 5-10 | Lost 2 |
| » Starters: Pete Standridge vs Babe Adams | Seventh | 7 out |
| Sunday, May 2 |
| » Lost to Cubs (10-6), 7-1 | West Side Grounds (1-3) | 5-11 | Lost 3 |
| » Starters: George McQuillan vs Hippo Vaughn | Seventh | 7½ out |
| Monday, May 3 |
| » Lost to Cubs (11-6), 5-1 | West Side Grounds (1-4) | 5-12 | Lost 4 |
| » Starters: Wilbur Cooper vs George Pearce | Seventh | 7½ out |
| Tuesday, May 4 |
| » Defeated Cardinals (10-10), 4-3 | Forbes Field (2-3) | 6-12 | |
| » Starters: Hub Perdue vs Bob Harmon | Seventh | 7 out |
| Thursday, May 6 |
| » Defeated Cardinals (10-11), 9-3 | Forbes Field (3-3) | 7-12 | Won 2 |
| » Starters: Lee Meadows vs Babe Adams | Seventh | 6½ out |
| Friday, May 7 |
| » Defeated Cardinals (10-12), 6-4 | Forbes Field (4-3) | 8-12 | Won 3 |
| » Starters: Bill Doak vs George McQuillan | Sixth | 6 out |
| Saturday, May 8 |
| » Defeated Cardinals (10-13), 3-2 | Forbes Field (5-3) | 9-12 | Won 4 |
| » Starters: Hub Perdue vs Al Mamaux | Sixth | 5 out |
| Sunday, May 9 |
| » Defeated Reds (10-10), 8-3 | Crosley Field (3-2) | 10-12 | Won 5 |
| » Starters: Bob Harmon vs Phil Douglas | Fifth | 4½ out |
| Monday, May 10 |
| » Defeated Cubs (13-8), 10-7 | Forbes Field (6-3) | 11-12 | Won 6 |
| » Starters: Zip Zabel vs Wilbur Cooper | Fifth | 3½ out |
| Tuesday, May 11 |
| » Lost to Phillies (14-7), 4-2 | Baker Bowl (0-1) | 11-13 | |
| » Starters: George McQuillan vs Pete Alexander | Fifth | 4½ out |
| Thursday, May 13 |
| » Defeated Phillies (14-8), 3-1 | Baker Bowl (1-1) | 12-13 | |
| » Starters: Bob Harmon vs Al Demaree | Fourth | 3½ out |
| Friday, May 14 |
| » Lost to Phillies (15-8), 5-3 | Baker Bowl (1-2) | 12-14 | |
| » Starters: Al Mamaux vs George Chalmers | Fourth | 4½ out |
| Saturday, May 15 |
| » Defeated Braves (13-11), 10-6 | Fenway Park (1-0) | 13-14 | |
| » Starters: Wilbur Cooper vs Dick Rudolph | Fourth | 4½ out |
| Tuesday, May 18 |
| » Lost to Braves (14-11), 3-2 | Fenway Park (1-1) | 13-15 | |
| » Starters: Bob Harmon vs Bill James | Fifth | 5 out |
| Wednesday, May 19 |
| » Defeated Braves (14-12), 7-0 | Fenway Park (2-1) | 14-15 | |
| » Starters: Al Mamaux vs Pat Ragan | Fifth | 4 out |
| Thursday, May 20 |
| » Defeated Giants (11-16), 6-2 | Polo Grounds V (1-0) | 15-15 | Won 2 |
| » Starters: Babe Adams vs Pol Perritt | Fourth | 3 out |
| Tuesday, May 25 |
| » Lost to Dodgers (15-15), 5-1 | Ebbets Field (0-1) | 15-16 | |
| » Starters: George McQuillan vs Jeff Pfeffer | Fifth | 4 out |
| Thursday, May 27 |
| » Lost to Dodgers (16-15), 2-0 | Ebbets Field (0-2) | 15-17 | Lost 2 |
| » Starters: Wilbur Cooper vs Wheezer Dell | Fifth | 5 out |
| Friday, May 28 |
| » Defeated Dodgers (16-16), 3-1 | Ebbets Field (1-2) | 16-17 | |
| » Starters: Al Mamaux vs Jack Coombs | Sixth | 3½ out |
| Saturday, May 29 |
| » Tied Cardinals, 0-0 | Forbes Field (6-3) | 16-17 | |
| » Starters: Dan Griner vs Babe Adams | Sixth | 4½ out |
| » Lost to Cardinals (18-18), 5-3 | Forbes Field (6-4) | 16-18 | |
| » Starters: Lee Meadows vs George McQuillan | Sixth | 4½ out |
| Sunday, May 30 |
| » Lost to Reds (14-18), 4-0 | Crosley Field (3-3) | 16-19 | Lost 2 |
| » Starters: Bob Harmon vs Pete Schneider | Sixth | 5½ out |
| Monday, May 31 |
| » Defeated Cubs (22-15), 1-0 | Forbes Field (7-4) | 17-19 | |
| » Starters: Jimmy Lavender vs Wilbur Cooper | Fifth | 3½ out |
| » Defeated Cubs (22-16), 1-0 | Forbes Field (8-4) | 18-19 | Won 2 |
| » Starters: Larry Cheney vs Al Mamaux | Fifth | 3½ out |
| Tuesday, June 1 |
| » Lost to Cubs (23-16), 2-0 | Forbes Field (8-5) | 18-20 | |
| » Starters: Zip Zabel vs Babe Adams | Sixth | 4½ out |
| Friday, June 4 |
| » Lost to Dodgers (21-19), 8-2 | Forbes Field (8-6) | 18-21 | Lost 2 |
| » Starters: Jeff Pfeffer vs Wilbur Cooper | Sixth | 5 out |
| Saturday, June 5 |
| » Defeated Dodgers (21-20), 11-0 | Forbes Field (9-6) | 19-21 | |
| » Starters: Wheezer Dell vs Al Mamaux | Sixth | 4 out |
| Monday, June 7 |
| » Defeated Dodgers (21-21), 6-1 | Forbes Field (10-6) | 20-21 | Won 2 |
| » Starters: Jack Coombs vs Babe Adams | Sixth | 4 out |
| Tuesday, June 8 |
| » Lost to Dodgers (22-21), 4-3 | Forbes Field (10-7) | 20-22 | |
| » Starters: Sherry Smith vs George McQuillan | Sixth | 4 out |
| Wednesday, June 9 |
| » Defeated Braves (22-21), 7-3 | Forbes Field (11-7) | 21-22 | |
| » Starters: Lefty Tyler vs Al Mamaux | Sixth | 3½ out |
| Thursday, June 10 |
| » Defeated Braves (22-22), 2-1 | Forbes Field (12-7) | 22-22 | Won 2 |
| » Starters: Tom Hughes vs Bob Harmon | Fourth | 3 out |
| Saturday, June 12 |
| » Lost to Braves (23-22), 8-2 | Forbes Field (12-8) | 22-23 | |
| » Starters: Pat Ragan vs Babe Adams | Sixth | 3½ out |
| Monday, June 14 |
| » Lost to Phillies (27-20), 4-1 | Forbes Field (12-9) | 22-24 | Lost 2 |
| » Starters: Pete Alexander vs Al Mamaux | Sixth | 4½ out |
| Wednesday, June 16 |
| » Defeated Phillies (27-21), 2-1 | Forbes Field (13-9) | 23-24 | |
| » Starters: George Chalmers vs Bob Harmon | Fourth | 3½ out |
| Thursday, June 17 |
| » Lost to Giants (21-24), 3-1 | Forbes Field (13-10) | 23-25 | |
| » Starters: Rube Marquard vs George McQuillan | Fifth | 4½ out |
| Friday, June 18 |
| » Defeated Giants (21-25), 7-5 | Forbes Field (14-10) | 24-25 | |
| » Starters: Pol Perritt vs Al Mamaux | Fourth | 4 out |
| Saturday, June 19 |
| » Defeated Giants (21-26), 4-0 | Forbes Field (15-10) | 25-25 | Won 2 |
| » Starters: Jeff Tesreau vs Bob Harmon | Fourth | 4 out |
| Monday, June 21 |
| » Defeated Phillies (28-24), 4-3 | Forbes Field (16-10) | 26-25 | Won 3 |
| » Starters: Erskine Mayer vs Babe Adams | Fourth | 4 out |
| Tuesday, June 22 |
| » Defeated Reds (21-28), 3-1 | Crosley Field (4-3) | 27-25 | Won 4 |
| » Starters: George McQuillan vs Pete Schneider | Fourth | 3½ out |
| Wednesday, June 23 |
| » Defeated Reds (21-29), 6-2 | Crosley Field (5-3) | 28-25 | Won 5 |
| » Starters: Bob Harmon vs Rube Benton | Fourth | 3½ out |
| Thursday, June 24 |
| » Lost to Reds (22-29), 5-3 | Forbes Field (16-11) | 28-26 | |
| » Starters: Fred Toney vs Al Mamaux | Fourth | 4½ out |
| Saturday, June 26 |
| » Defeated Reds (22-30), 6-3 | Forbes Field (17-11) | 29-26 | |
| » Starters: Gene Dale vs George McQuillan | Fourth | 4 out |
| Tuesday, June 29 |
| » Defeated Cardinals (33-30), 8-5 | Robison Field (2-3) | 30-26 | Won 2 |
| » Starters: Bob Harmon vs Lee Meadows | Fourth | 3½ out |
| » Lost to Cardinals (34-30), 6-4 | Robison Field (2-4) | 30-27 | |
| » Starters: Wilbur Cooper vs Hank Robinson | Fourth | 3½ out |
| Wednesday, June 30 |
| » Lost to Cardinals (35-30), 2-0 | Robison Field (2-5) | 30-28 | Lost 2 |
| » Starters: Babe Adams vs Bill Doak | Fourth | 3½ out |
| » Defeated Cardinals (35-31), 4-2 | Robison Field (3-5) | 31-28 | |
| » Starters: George McQuillan vs Slim Sallee | Fourth | 3½ out |
| Thursday, July 1 |
| » Defeated Cubs (35-26), 4-0 | West Side Grounds (2-4) | 32-28 | Won 2 |
| » Starters: Al Mamaux vs Hippo Vaughn | Third | 2½ out |
| Friday, July 2 |
| » Lost to Cubs (36-26), 2-1 | West Side Grounds (2-5) | 32-29 | |
| » Starters: Bob Harmon vs George Pearce | Fourth | 3½ out |
| Saturday, July 3 |
| » Lost to Cubs (37-26), 6-5 | West Side Grounds (2-6) | 32-30 | Lost 2 |
| » Starters: Wilbur Cooper vs Bert Humphries | Fourth | 3½ out |
| » Defeated Cubs (37-27), 4-2 | West Side Grounds (3-6) | 33-30 | |
| » Starters: Babe Adams vs Zip Zabel | Fourth | 3½ out |
| Sunday, July 4 |
| » Lost to Cubs (38-27), 8-5 | West Side Grounds (3-7) | 33-31 | |
| » Starters: George McQuillan vs Larry Cheney | Third | 4½ out |
| Monday, July 5 |
| » Lost to Cardinals (37-34), 3-1 | Forbes Field (17-12) | 33-32 | Lost 2 |
| » Starters: Bill Doak vs Al Mamaux | Third | 3½ out |
| » Defeated Cardinals (37-35), 5-0 | Forbes Field (18-12) | 34-32 | |
| » Starters: Lee Meadows vs Bob Harmon | Third | 3½ out |
| Tuesday, July 6 |
| » Lost to Cardinals (38-35), 2-1 | Forbes Field (18-13) | 34-33 | |
| » Starters: Dan Griner vs George McQuillan | Fourth | 4½ out |
| Wednesday, July 7 |
| » Lost to Cubs (40-29), 7-4 | Forbes Field (18-14) | 34-34 | Lost 2 |
| » Starters: Jimmy Lavender vs Babe Adams | Fourth | 5½ out |
| Thursday, July 8 |
| » Defeated Phillies (36-31), 2-0 | Baker Bowl (2-2) | 35-34 | |
| » Starters: Al Mamaux vs Eppa Rixey | Fourth | 5 out |
| Friday, July 9 |
| » Lost to Phillies (37-31), 2-1 | Baker Bowl (2-3) | 35-35 | |
| » Starters: Bob Harmon vs Pete Alexander | Fourth | 5 out |
| Saturday, July 10 |
| » Lost to Phillies (38-31), 6-3 | Baker Bowl (2-4) | 35-36 | Lost 2 |
| » Starters: Babe Adams vs Al Demaree | Fifth | 4½ out |
| Monday, July 12 |
| » Defeated Phillies (38-32), 2-1 | Baker Bowl (3-4) | 36-36 | |
| » Starters: George McQuillan vs Erskine Mayer | Fifth | 3 out |
| » Defeated Phillies (38-33), 4-2 | Baker Bowl (4-4) | 37-36 | Won 2 |
| » Starters: Al Mamaux vs George Chalmers | Fifth | 3 out |
| Tuesday, July 13 |
| » Defeated Braves (32-43), 3-1 | Fenway Park (3-1) | 38-36 | Won 3 |
| » Starters: Erv Kantlehner vs Pat Ragan | Fifth | 2½ out |
| » Lost to Braves (33-43), 7-6 | Fenway Park (3-2) | 38-37 | |
| » Starters: Bob Harmon vs Iron Davis | Fifth | 2½ out |
| Thursday, July 15 |
| » Lost to Braves (34-43), 3-2 | Fenway Park (3-3) | 38-38 | Lost 2 |
| » Starters: Wilbur Cooper vs Dick Rudolph | Fifth | 4 out |
| Friday, July 16 |
| » Lost to Braves (35-43), 6-5 | Fenway Park (3-4) | 38-39 | Lost 3 |
| » Starters: Al Mamaux vs Lefty Tyler | Fifth | 4½ out |
| » Major-league debuts: Pat Duncan (Pirates) |
| Saturday, July 17 |
| » Defeated Dodgers (41-37), 5-3 | Ebbets Field (2-2) | 39-39 | |
| » Starters: George McQuillan vs Sherry Smith | Fourth | 4 out |
| » Lost to Dodgers (42-37), 7-3 | Ebbets Field (2-3) | 39-40 | |
| » Starters: Joe Conzelman vs Jeff Pfeffer | Fourth | 4 out |
| Monday, July 19 |
| » Lost to Dodgers (43-37), 3-0 | Ebbets Field (2-4) | 39-41 | Lost 2 |
| » Starters: Erv Kantlehner vs Nap Rucker | Fourth | 5 out |
| Tuesday, July 20 |
| » Defeated Dodgers (43-38), 6-2 | Ebbets Field (3-4) | 40-41 | |
| » Starters: Bob Harmon vs Phil Douglas | Fourth | 5 out |
| Friday, July 23 |
| » Defeated Giants (38-40), 6-1 | Polo Grounds V (2-0) | 41-41 | Won 2 |
| » Starters: Babe Adams vs Christy Mathewson | Fourth | 4 out |
| » Defeated Giants (38-41), 4-3 | Polo Grounds V (3-0) | 42-41 | Won 3 |
| » Starters: Al Mamaux vs Jeff Tesreau | Fourth | 4 out |
| Saturday, July 24 |
| » Lost to Giants (39-41), 8-4 | Polo Grounds V (3-1) | 42-42 | |
| » Starters: Bob Harmon vs Sailor Stroud | Fifth | 6 out |
| » Lost to Giants (40-41), 4-2 | Polo Grounds V (3-2) | 42-43 | Lost 2 |
| » Starters: Wilbur Cooper vs Pol Perritt | Fifth | 6 out |
| Monday, July 26 |
| » Defeated Giants (40-42), 2-1 | Polo Grounds V (4-2) | 43-43 | |
| » Starters: Babe Adams vs Christy Mathewson | Fifth | 7 out |
| » Lost to Giants (41-42), 3-0 | Polo Grounds V (4-3) | 43-44 | |
| » Starters: George McQuillan vs Jeff Tesreau | Fifth | 7 out |
| Tuesday, July 27 |
| » Defeated Giants (41-43), 8-1 | Forbes Field (19-14) | 44-44 | |
| » Starters: Rube Marquard vs Al Mamaux | Fourth | 6 out |
| Thursday, July 29 |
| » Defeated Dodgers (48-41), 8-2 | Forbes Field (20-14) | 45-44 | Won 2 |
| » Starters: Jeff Pfeffer vs Erv Kantlehner | Fourth | 5½ out |
| Friday, July 30 |
| » Lost to Dodgers (49-41), 3-2 | Forbes Field (20-15) | 45-45 | |
| » Starters: Nap Rucker vs Bob Harmon | Fifth | 6 out |
| Saturday, July 31 |
| » Defeated Dodgers (49-42), 5-0 | Forbes Field (21-15) | 46-45 | |
| » Starters: Ed Appleton vs Al Mamaux | Third | 5 out |
| » Defeated Dodgers (49-43), 5-4 | Forbes Field (22-15) | 47-45 | Won 2 |
| » Starters: Sherry Smith vs Babe Adams | Third | 5 out |
| Tuesday, August 3 |
| » Lost to Braves (48-46), 5-4 | Forbes Field (22-16) | 47-46 | |
| » Starters: Pat Ragan vs Erv Kantlehner | Fifth | 5 out |
| » Lost to Braves (49-46), 7-2 | Forbes Field (22-17) | 47-47 | Lost 2 |
| » Starters: Lefty Tyler vs Bob Harmon | Fifth | 5 out |
| Wednesday, August 4 |
| » Lost to Braves (50-46), 5-1 | Forbes Field (22-18) | 47-48 | Lost 3 |
| » Starters: Iron Davis vs Al Mamaux | Fifth | 5½ out |
| Thursday, August 5 |
| » Defeated Phillies (51-42), 1-0 | Forbes Field (23-18) | 48-48 | |
| » Starters: Pete Alexander vs Babe Adams | Fifth | 4½ out |
| Friday, August 6 |
| » Lost to Phillies (52-42), 5-4 | Forbes Field (23-19) | 48-49 | |
| » Starters: Al Demaree vs George McQuillan | Sixth | 5½ out |
| Saturday, August 7 |
| » Defeated Phillies (52-43), 9-0 | Forbes Field (24-19) | 49-49 | |
| » Starters: Erskine Mayer vs Al Mamaux | Fifth | 3½ out |
| » Defeated Phillies (52-44), 6-0 | Forbes Field (25-19) | 50-49 | Won 2 |
| » Starters: Eppa Rixey vs Bob Harmon | Fifth | 3½ out |
| Future Pirate Les Fleming is born in Singleton, TX. |
| Tuesday, August 10 |
| » Defeated Giants (49-48), 8-2 | Forbes Field (26-19) | 51-49 | Won 3 |
| » Starters: Rube Marquard vs Babe Adams | Third | 3 out |
| Thursday, August 12 |
| » Defeated Giants (49-49), 4-0 | Forbes Field (27-19) | 52-49 | Won 4 |
| » Starters: Jeff Tesreau vs Al Mamaux | Third | 2½ out |
| Friday, August 13 |
| » Lost to Reds (44-57), 4-3 | Forbes Field (27-20) | 52-50 | |
| » Starters: Pete Schneider vs Bob Harmon | Fourth | 3½ out |
| Saturday, August 14 |
| » Lost to Reds (45-57), 5-4 | Forbes Field (27-21) | 52-51 | Lost 2 |
| » Starters: Gene Dale vs Babe Adams | Fourth | 5 out |
| » Lost to Reds (46-57), 6-0 | Forbes Field (27-22) | 52-52 | Lost 3 |
| » Starters: Fred Toney vs George McQuillan | Fourth | 5 out |
| Sunday, August 15 |
| » Lost to Reds (47-57), 6-2 | Crosley Field (5-4) | 52-53 | Lost 4 |
| » Starters: Wilbur Cooper vs Gene Dale | Fifth | 6 out |
| » Lost to Reds (48-57), 6-2 | Crosley Field (5-5) | 52-54 | Lost 5 |
| » Starters: Bob Harmon vs Limb McKenry | Fifth | 6 out |
| Monday, August 16 |
| » Defeated Reds (48-58), 5-4 | Forbes Field (28-22) | 53-54 | |
| » Starters: Pete Schneider vs Erv Kantlehner | Sixth | 6 out |
| Tuesday, August 17 |
| » Lost to Cubs (54-51), 6-4 | Forbes Field (28-23) | 53-55 | |
| » Starters: Zip Zabel vs Wilbur Cooper | Fifth | 6 out |
| Wednesday, August 18 |
| » Defeated Phillies (56-47), 8-4 | Baker Bowl (5-4) | 54-55 | |
| » Starters: Babe Adams vs Erskine Mayer | Fifth | 5 out |
| Thursday, August 19 |
| » Defeated Phillies (56-48), 8-3 | Baker Bowl (6-4) | 55-55 | Won 2 |
| » Starters: Bob Harmon vs Al Demaree | Fourth | 4 out |
| Friday, August 20 |
| » Lost to Phillies (57-48), 4-3 | Baker Bowl (6-5) | 55-56 | |
| » Starters: Wilbur Cooper vs Eppa Rixey | Fifth | 5 out |
| Saturday, August 21 |
| » Lost to Braves (55-54), 3-1 | Braves Field (0-1) | 55-57 | Lost 2 |
| » Starters: Erv Kantlehner vs Dick Rudolph | Fifth | 7 out |
| » Lost to Braves (56-54), 2-0 | Braves Field (0-2) | 55-58 | Lost 3 |
| » Starters: Al Mamaux vs Art Nehf | Fifth | 7 out |
| Monday, August 23 |
| » Lost to Braves (57-54), 3-2 | Braves Field (0-3) | 55-59 | Lost 4 |
| » Starters: Babe Adams vs Lefty Tyler | Fifth | 7½ out |
| Tuesday, August 24 |
| » Lost to Braves (58-54), 10-0 | Braves Field (0-4) | 55-60 | Lost 5 |
| » Starters: Wilbur Cooper vs Pat Ragan | Sixth | 7½ out |
| Wednesday, August 25 |
| » Lost to Giants (52-58), 5-3 | Polo Grounds V (4-4) | 55-61 | Lost 6 |
| » Starters: Bob Harmon vs Pol Perritt | Sixth | 8½ out |
| » Defeated Giants (52-59), 9-7 | Polo Grounds V (5-4) | 56-61 | |
| » Starters: Al Mamaux vs Rube Benton | Sixth | 8½ out |
| Thursday, August 26 |
| » Defeated Giants (52-60), 2-1 | Polo Grounds V (6-4) | 57-61 | Won 2 |
| » Starters: Erv Kantlehner vs Sailor Stroud | Fifth | 8½ out |
| Friday, August 27 |
| » Lost to Giants (53-60), 2-1 | Polo Grounds V (6-5) | 57-62 | |
| » Starters: Babe Adams vs Christy Mathewson | Sixth | 9½ out |
| Saturday, August 28 |
| » Lost to Dodgers (64-56), 2-1 | Ebbets Field (3-5) | 57-63 | Lost 2 |
| » Starters: Bob Harmon vs Nap Rucker | Seventh | 10½ out |
| » Lost to Dodgers (65-56), 3-0 | Ebbets Field (3-6) | 57-64 | Lost 3 |
| » Starters: Erv Kantlehner vs Jeff Pfeffer | Seventh | 10½ out |
| Tuesday, August 31 |
| » Defeated Dodgers (65-57), 5-3 | Ebbets Field (4-6) | 58-64 | |
| » Starters: Al Mamaux vs Jack Coombs | Seventh | 11 out |
| » Lost to Dodgers (66-57), 3-2 | Ebbets Field (4-7) | 58-65 | |
| » Starters: Erv Kantlehner vs Larry Cheney | Seventh | 11 out |
| Wednesday, September 1 |
| » Lost to Cardinals (60-64), 4-0 | Forbes Field (28-24) | 58-66 | Lost 2 |
| » Starters: Slim Sallee vs Babe Adams | Seventh | 10½ out |
| » Defeated Cardinals (60-65), 7-0 | Forbes Field (29-24) | 59-66 | |
| » Starters: Hub Perdue vs Bob Harmon | Seventh | 10½ out |
| Thursday, September 2 |
| » Lost to Cardinals (61-65), 7-2 | Forbes Field (29-25) | 59-67 | |
| » Starters: Bill Doak vs Herb Kelly | Seventh | 12 out |
| Friday, September 3 |
| » Defeated Cubs (59-61), 4-1 | Forbes Field (30-25) | 60-67 | |
| » Starters: Bert Humphries vs Al Mamaux | Seventh | 11 out |
| Saturday, September 4 |
| » Lost to Cubs (60-61), 5-2 | Forbes Field (30-26) | 60-68 | |
| » Starters: Hippo Vaughn vs Erv Kantlehner | Sixth | 11½ out |
| » Defeated Cubs (60-62), 2-1 | Forbes Field (31-26) | 61-68 | |
| » Starters: Jimmy Lavender vs Babe Adams | Sixth | 11½ out |
| Sunday, September 5 |
| » Defeated Cubs (60-63), 13-2 | West Side Grounds (4-7) | 62-68 | Won 2 |
| » Starters: Wilbur Cooper vs Karl Adams | Sixth | 11 out |
| » Major-league debuts: Bob O'Farrell (Cubs) |
| Monday, September 6 |
| » Lost to Reds (57-68), 3-0 | Forbes Field (31-27) | 62-69 | |
| » Starters: Pete Schneider vs Al Mamaux | Seventh | 10 out |
| » Defeated Reds (57-69), 5-2 | Forbes Field (32-27) | 63-69 | |
| » Starters: Limb McKenry vs Bob Harmon | Seventh | 10 out |
| Tuesday, September 7 |
| » Lost to Reds (58-69), 6-3 | Forbes Field (32-28) | 63-70 | |
| » Starters: Fred Toney vs Erv Kantlehner | Seventh | 10 out |
| Friday, September 10 |
| » Defeated Braves (68-61), 8-1 | Forbes Field (33-28) | 64-70 | |
| » Starters: Art Nehf vs Babe Adams | Sixth | 12 out |
| » Lost to Braves (69-61), 3-2 | Forbes Field (33-29) | 64-71 | |
| » Starters: Dick Rudolph vs Erv Kantlehner | Sixth | 12 out |
| Saturday, September 11 |
| » Lost to Phillies (74-56), 3-2 | Forbes Field (33-30) | 64-72 | Lost 2 |
| » Starters: Erskine Mayer vs Bob Harmon | Seventh | 13 out |
| Monday, September 13 |
| » Lost to Phillies (75-56), 4-2 | Forbes Field (33-31) | 64-73 | Lost 3 |
| » Starters: Pete Alexander vs Wilbur Cooper | Seventh | 14 out |
| Tuesday, September 14 |
| » Lost to Phillies (76-56), 4-3 | Forbes Field (33-32) | 64-74 | Lost 4 |
| » Starters: George Chalmers vs Babe Adams | Seventh | 15 out |
| Wednesday, September 15 |
| » Defeated Phillies (76-57), 1-0 | Forbes Field (34-32) | 65-74 | |
| » Starters: Erskine Mayer vs Erv Kantlehner | Seventh | 14 out |
| Thursday, September 16 |
| » Lost to Giants (61-73), 8-4 | Forbes Field (34-33) | 65-75 | |
| » Starters: Sailor Stroud vs Bob Harmon | Seventh | 15 out |
| Friday, September 17 |
| » Defeated Giants (61-74), 9-6 | Forbes Field (35-33) | 66-75 | |
| » Starters: Rube Benton vs Wilbur Cooper | Seventh | 13½ out |
| » Defeated Giants (61-75), 5-0 | Forbes Field (36-33) | 67-75 | Won 2 |
| » Starters: Pol Perritt vs Carmen Hill | Seventh | 13½ out |
| Saturday, September 18 |
| » Defeated Giants (61-76), 8-2 | Forbes Field (37-33) | 68-75 | Won 3 |
| » Starters: Christy Mathewson vs Babe Adams | Seventh | 14 out |
| » Lost to Giants (62-76), 7-2 | Forbes Field (37-34) | 68-76 | |
| » Starters: Jeff Tesreau vs Erv Kantlehner | Seventh | 14 out |
| Monday, September 20 |
| » Defeated Dodgers (75-65), 1-0 | Forbes Field (38-34) | 69-76 | |
| » Starters: Jeff Pfeffer vs Bob Harmon | Fifth | 13½ out |
| Wednesday, September 22 |
| » Lost to Dodgers (76-65), 4-2 | Forbes Field (38-35) | 69-77 | |
| » Starters: Nap Rucker vs Wilbur Cooper | Fourth | 14½ out |
| » Defeated Dodgers (76-66), 2-1 | Forbes Field (39-35) | 70-77 | |
| » Starters: Larry Cheney vs Carmen Hill | Fourth | 14½ out |
| Thursday, September 23 |
| » Defeated Braves (76-66), 8-4 | Forbes Field (40-35) | 71-77 | Won 2 |
| » Starters: Dick Rudolph vs Al Mamaux | Fourth | 15 out |
| Former Pirate Brickyard Kennedy dies in Bellaire, OH at the age of 48. |
| Friday, September 24 |
| » Lost to Braves (77-66), 2-0 | Forbes Field (40-36) | 71-78 | |
| » Starters: Art Nehf vs Erv Kantlehner | Fourth | 15½ out |
| Saturday, September 25 |
| » Lost to Braves (78-66), 5-2 | Forbes Field (40-37) | 71-79 | Lost 2 |
| » Starters: Lefty Tyler vs Bob Harmon | Fourth | 16½ out |
| Thursday, September 30 |
| » Defeated Cardinals (70-80), 6-5 | Robison Field (4-5) | 72-79 | |
| » Starters: Babe Adams vs Lee Meadows | Fourth | 16½ out |
| » Major-league debuts: Jack Smith (Cardinals) |
| Friday, October 1 |
| » Lost to Cardinals (71-80), 6-3 | Robison Field (4-6) | 72-80 | |
| » Starters: Carmen Hill vs Bill Doak | Fourth | 17½ out |
| Saturday, October 2 |
| » Lost to Cardinals (72-80), 3-1 | Robison Field (4-7) | 72-81 | Lost 2 |
| » Starters: Al Mamaux vs Red Ames | Fifth | 18 out |
| Sunday, October 3 |
| » Defeated Reds (71-83), 5-3 | Crosley Field (6-5) | 73-81 | |
| » Starters: Erv Kantlehner vs Pete Schneider | Fifth | 17½ out |
| Thursday, October 7 |
| » Major-league debuts: Red Shannon (Braves) |
| Thursday, October 14 |
| Future Pirate Ken Heintzelman is born in Peruque, MO. |
| Sunday, October 17 |
| Future Pirate Mike Sandlock is born in Old Greenwich, CT. |
| Saturday, November 13 |
| Future Pirate Ted Wilks is born in Fulton, NY. |
| Tuesday, December 7 |
| Future Pirate Johnny Gee is born in Syracuse, NY. Future Pirate Vinnie Smith is born in Richmond, VA. |
| Saturday, December 18 |
| Future Pirate Johnny Barrett is born in Lowell, MA. |
| Friday, December 31 |
| Former Pirate Tip O'Neill dies in Montreal, PQ at the age of 58. |
Game information provided by Retrosheet (www.retrosheet.org) |
