| Friday, February 9 |
| Future Pirate Dutch Dietz is born in Cincinnati, OH. |
| Friday, February 16 |
| Future Pirate Ray Harrell is born in Petrolia, TX. |
| Sunday, March 3 |
| Future Pirate Aubrey Epps is born in Memphis, TN. |
| Friday, March 8 |
| Future Pirate Ray Mueller is born in Pittsburg, KS. |
| Saturday, March 9 |
| Future Pirate Arky Vaughan is born in Clifty, AR. |
| Thursday, April 11 |
| » Lost to Cardinals (1-0), 7-0 | Robison Field (0-1) | 0-1 | |
| » Starters: Howie Camnitz vs Bob Harmon | Second | 1 out |
| Saturday, April 13 |
| » Lost to Cardinals (2-0), 6-5 | Robison Field (0-2) | 0-2 | Lost 2 |
| » Starters: Claude Hendrix vs Bill Steele | Fourth | 2 out |
| Sunday, April 14 |
| » Lost to Reds (3-0), 11-7 | Crosley Field (0-1) | 0-3 | Lost 3 |
| » Starters: Howie Camnitz vs George Suggs | Fourth | 3 out |
| » Major-league debuts: Wally Rehg (Pirates) |
| Monday, April 15 |
| » Lost to Reds (4-0), 3-2 | Crosley Field (0-2) | 0-4 | Lost 4 |
| » Starters: Babe Adams vs Art Fromme | Fifth | 4 out |
| Tuesday, April 16 |
| » Defeated Reds (4-1), 8-2 | Crosley Field (1-2) | 1-4 | |
| » Starters: Marty O'Toole vs Frank Smith | Fourth | 3 out |
| Thursday, April 18 |
| » Defeated Cardinals (4-2), 4-3 | Forbes Field (1-0) | 2-4 | Won 2 |
| » Starters: Slim Sallee vs Claude Hendrix | Sixth | 2½ out |
| Saturday, April 20 |
| » Defeated Cardinals (4-3), 7-0 | Forbes Field (2-0) | 3-4 | Won 3 |
| » Starters: Bob Harmon vs Howie Camnitz | Fifth | 1½ out |
| Sunday, April 21 |
| » Lost to Cubs (3-4), 6-0 | West Side Grounds (0-1) | 3-5 | |
| » Starters: Lefty Leifield vs Larry Cheney | Sixth | 2½ out |
| Monday, April 22 |
| » Major-league debuts: Wheezer Dell (Cardinals) |
| Tuesday, April 23 |
| » Defeated Cubs (3-5), 5-3 | West Side Grounds (1-1) | 4-5 | |
| » Starters: Babe Adams vs Mordecai Brown | Fourth | 3 out |
| » Major-league debuts: Jimmy Lavender (Cubs) |
| Wednesday, April 24 |
| » Major-league debuts: Bill Brinker (Phillies) |
| Thursday, April 25 |
| » Lost to Reds (8-2), 1-0 | Forbes Field (2-1) | 4-6 | |
| » Starters: George Suggs vs Marty O'Toole | Fifth | 4 out |
| Friday, April 26 |
| » Major-league debuts: Elmer Miller (Cardinals) |
| Saturday, April 27 |
| » Defeated Reds (8-3), 23-4 | Forbes Field (3-1) | 5-6 | |
| » Starters: Art Fromme vs Howie Camnitz | Third | 3 out |
| » Major-league debuts: Hanson Horsey (Reds) |
| Sunday, April 28 |
| » Lost to Reds (9-3), 3-2 | Crosley Field (1-3) | 5-7 | |
| » Starters: Claude Hendrix vs Harry Gaspar | Fifth | 4 out |
| Wednesday, May 1 |
| » Lost to Cubs (6-7), 7-2 | Forbes Field (3-2) | 5-8 | Lost 2 |
| » Starters: Lew Richie vs Babe Adams | Fifth | 5½ out |
| Thursday, May 2 |
| » Defeated Cubs (6-8), 6-0 | Forbes Field (4-2) | 6-8 | |
| » Starters: Harry McIntire vs Marty O'Toole | Fourth | 5½ out |
| Friday, May 3 |
| » Lost to Cubs (7-8), 9-8 | Forbes Field (4-3) | 6-9 | |
| » Starters: Larry Cheney vs Howie Camnitz | Fifth | 6 out |
| Saturday, May 4 |
| » Defeated Cubs (7-9), 12-11 | Forbes Field (5-3) | 7-9 | |
| » Starters: Ed Reulbach vs Babe Adams | Fourth | 6 out |
| Sunday, May 5 |
| » Lost to Cubs (8-9), 6-2 | West Side Grounds (1-2) | 7-10 | |
| » Starters: Marty O'Toole vs Lew Richie | Fifth | 7 out |
| Thursday, May 9 |
| » Lost to Dodgers (7-9), 6-5 | Forbes Field (5-4) | 7-11 | Lost 2 |
| » Starters: Maury Kent vs Claude Hendrix | Seventh | 7½ out |
| » Major-league debuts: Jim Viox (Pirates) |
| Friday, May 10 |
| » Defeated Phillies (7-11), 8-4 | Forbes Field (6-4) | 8-11 | |
| » Starters: Ad Brennan vs Marty O'Toole | Fifth | 7½ out |
| Saturday, May 11 |
| » Defeated Phillies (7-12), 8-0 | Forbes Field (7-4) | 9-11 | Won 2 |
| » Starters: Earl Moore vs Babe Adams | Fourth | 7½ out |
| Wednesday, May 15 |
| » Lost to Giants (18-4), 4-3 | Forbes Field (7-5) | 9-12 | |
| » Starters: Red Ames vs Howie Camnitz | Fourth | 8½ out |
| Thursday, May 16 |
| » Lost to Giants (19-4), 4-1 | Forbes Field (7-6) | 9-13 | Lost 2 |
| » Starters: Rube Marquard vs Marty O'Toole | Fourth | 9½ out |
| Saturday, May 18 |
| » Defeated Braves (10-17), 8-7 | Forbes Field (8-6) | 10-13 | |
| » Starters: Lefty Tyler vs Babe Adams | Fourth | 8½ out |
| Monday, May 20 |
| » Defeated Braves (10-18), 13-4 | Forbes Field (9-6) | 11-13 | Won 2 |
| » Starters: Otto Hess vs Claude Hendrix | Fourth | 8 out |
| Tuesday, May 21 |
| » Defeated Braves (10-19), 14-9 | Forbes Field (10-6) | 12-13 | Won 3 |
| » Starters: Buster Brown vs Howie Camnitz | Fourth | 8 out |
| Wednesday, May 22 |
| » Lost to Braves (11-19), 3-0 | Forbes Field (10-7) | 12-14 | |
| » Starters: Walt Dickson vs Marty O'Toole | Fourth | 9 out |
| Thursday, May 23 |
| » Defeated Braves (11-20), 3-1 | Forbes Field (11-7) | 13-14 | |
| » Starters: Buster Brown vs Babe Adams | Fourth | 8½ out |
| Friday, May 24 |
| » Defeated Cubs (15-15), 7-3 | Forbes Field (12-7) | 14-14 | Won 2 |
| » Starters: Lew Richie vs Claude Hendrix | Third | 8½ out |
| Saturday, May 25 |
| » Defeated Cubs (15-16), 4-2 | Forbes Field (13-7) | 15-14 | Won 3 |
| » Starters: Jimmy Lavender vs Howie Camnitz | Third | 8½ out |
| Sunday, May 26 |
| » Defeated Cubs (15-17), 3-1 | West Side Grounds (2-2) | 16-14 | Won 4 |
| » Starters: Marty O'Toole vs Larry Cheney | Third | 8 out |
| Monday, May 27 |
| » Lost to Cardinals (17-21), 6-3 | Forbes Field (13-8) | 16-15 | |
| » Starters: Joe Willis vs Babe Adams | Third | 9 out |
| Tuesday, May 28 |
| » Lost to Cardinals (18-21), 7-4 | Forbes Field (13-9) | 16-16 | Lost 2 |
| » Starters: Rube Geyer vs Claude Hendrix | Third | 10 out |
| Thursday, May 30 |
| » Lost to Cardinals (19-21), 8-3 | Forbes Field (13-10) | 16-17 | Lost 3 |
| » Starters: Slim Sallee vs Howie Camnitz | Fourth | 11 out |
| » Defeated Cardinals (19-22), 9-7 | Forbes Field (14-10) | 17-17 | |
| » Starters: Bob Harmon vs Marty O'Toole | Fourth | 11 out |
| Friday, May 31 |
| » Defeated Reds (23-17), 6-2 | Forbes Field (15-10) | 18-17 | Won 2 |
| » Starters: Art Fromme vs Babe Adams | Fourth | 10 out |
| Saturday, June 1 |
| » Defeated Phillies (14-20), 7-5 | Baker Bowl (1-0) | 19-17 | Won 3 |
| » Starters: Hank Robinson vs Cliff Curtis | Fourth | 10 out |
| Monday, June 3 |
| » Lost to Phillies (15-20), 4-3 | Baker Bowl (1-1) | 19-18 | |
| » Starters: Claude Hendrix vs Pete Alexander | Fourth | 11 out |
| Tuesday, June 4 |
| » Lost to Phillies (16-20), 17-4 | Baker Bowl (1-2) | 19-19 | Lost 2 |
| » Starters: Marty O'Toole vs Ad Brennan | Fourth | 12 out |
| Wednesday, June 5 |
| » Defeated Braves (13-30), 7-5 | South End Grounds III (1-0) | 20-19 | |
| » Starters: Howie Camnitz vs Buster Brown | Fourth | 12 out |
| Friday, June 7 |
| » Defeated Braves (13-31), 4-0 | South End Grounds III (2-0) | 21-19 | Won 2 |
| » Starters: Claude Hendrix vs Walt Dickson | Fourth | 12 out |
| Saturday, June 8 |
| » Defeated Braves (13-32), 3-1 | South End Grounds III (3-0) | 22-19 | Won 3 |
| » Starters: Marty O'Toole vs Lefty Tyler | Fourth | 12 out |
| Monday, June 10 |
| » Lost to Dodgers (14-27), 1-0 | Washington Park III (0-1) | 22-20 | |
| » Starters: Howie Camnitz vs Nap Rucker | Fourth | 12 out |
| Tuesday, June 11 |
| » Defeated Dodgers (14-28), 16-4 | Washington Park III (1-1) | 23-20 | |
| » Starters: Claude Hendrix vs Elmer Knetzer | Fourth | 12 out |
| Wednesday, June 12 |
| » Defeated Dodgers (14-29), 7-3 | Washington Park III (2-1) | 24-20 | Won 2 |
| » Starters: Hank Robinson vs Frank Allen | Fourth | 12 out |
| Thursday, June 13 |
| » Defeated Dodgers (14-30), 5-0 | Washington Park III (3-1) | 25-20 | Won 3 |
| » Starters: Marty O'Toole vs Earl Yingling | Second | 12 out |
| Friday, June 14 |
| » Defeated Giants (37-9), 6-1 | Polo Grounds V (1-0) | 26-20 | Won 4 |
| » Starters: Howie Camnitz vs Hooks Wiltse | Second | 11 out |
| Saturday, June 15 |
| » Defeated Giants (37-10), 5-4 | Polo Grounds V (2-0) | 27-20 | Won 5 |
| » Starters: Claude Hendrix vs Doc Crandall | Second | 10 out |
| Future Pirate Babe Dahlgren is born in San Francisco, CA. |
| Monday, June 17 |
| » Lost to Giants (38-10), 5-4 | Polo Grounds V (2-1) | 27-21 | |
| » Starters: Marty O'Toole vs Rube Marquard | Second | 11 out |
| Tuesday, June 18 |
| » Defeated Giants (38-11), 7-2 | Polo Grounds V (3-1) | 28-21 | |
| » Starters: Howie Camnitz vs Christy Mathewson | Second | 10 out |
| Wednesday, June 19 |
| » Defeated Cardinals (23-34), 8-1 | Forbes Field (16-10) | 29-21 | Won 2 |
| » Starters: Gene Woodburn vs Hank Robinson | Second | 10 out |
| Future Pirate Don Gutteridge is born in Pittsburg, KS. |
| Thursday, June 20 |
| » Defeated Reds (30-26), 6-4 | Crosley Field (2-3) | 30-21 | Won 3 |
| » Starters: King Cole vs Bobby Keefe | Second | 10½ out |
| » Lost to Reds (31-26), 5-3 | Crosley Field (2-4) | 30-22 | |
| » Starters: Claude Hendrix vs Art Fromme | Second | 10½ out |
| Saturday, June 22 |
| » Defeated Reds (31-27), 2-1 | Forbes Field (17-10) | 31-22 | |
| » Starters: George Suggs vs Howie Camnitz | Second | 11½ out |
| Sunday, June 23 |
| » Lost to Reds (32-27), 12-1 | Crosley Field (2-5) | 31-23 | |
| » Starters: Marty O'Toole vs Rube Benton | Third | 12 out |
| Monday, June 24 |
| » Lost to Cardinals (25-37), 4-3 | Robison Field (0-3) | 31-24 | Lost 2 |
| » Starters: Hank Robinson vs Rube Geyer | Third | 13 out |
| Tuesday, June 25 |
| » Defeated Cardinals (25-38), 10-4 | Robison Field (1-3) | 32-24 | |
| » Starters: Claude Hendrix vs Gene Dale | Second | 12½ out |
| » Defeated Cardinals (25-39), 19-3 | Robison Field (2-3) | 33-24 | Won 2 |
| » Starters: King Cole vs Bob Harmon | Second | 12½ out |
| Wednesday, June 26 |
| » Defeated Cardinals (25-40), 4-3 | Robison Field (3-3) | 34-24 | Won 3 |
| » Starters: Howie Camnitz vs Slim Sallee | Second | 12½ out |
| Thursday, June 27 |
| » Defeated Cardinals (25-41), 3-2 | Robison Field (4-3) | 35-24 | Won 4 |
| » Starters: Marty O'Toole vs Rube Geyer | Second | 12½ out |
| Friday, June 28 |
| » Lost to Cubs (34-24), 3-0 | West Side Grounds (2-3) | 35-25 | |
| » Starters: Hank Robinson vs Jimmy Lavender | Third | 14 out |
| Saturday, June 29 |
| » Defeated Cubs (34-25), 6-1 | West Side Grounds (3-3) | 36-25 | |
| » Starters: Howie Camnitz vs Larry Cheney | Second | 14 out |
| Sunday, June 30 |
| » Defeated Cubs (34-26), 7-4 | West Side Grounds (4-3) | 37-25 | Won 2 |
| » Starters: Babe Adams vs Lew Richie | Second | 13½ out |
| Monday, July 1 |
| » Lost to Cubs (35-26), 1-0 | Forbes Field (17-11) | 37-26 | |
| » Starters: Jimmy Lavender vs Marty O'Toole | Second | 14½ out |
| Tuesday, July 2 |
| » Lost to Cubs (36-26), 9-2 | Forbes Field (17-12) | 37-27 | Lost 2 |
| » Starters: Larry Cheney vs Hank Robinson | Third | 15½ out |
| Thursday, July 4 |
| » Defeated Reds (36-33), 11-5 | Forbes Field (18-12) | 38-27 | |
| » Starters: Rube Benton vs Howie Camnitz | Third | 14½ out |
| » Defeated Reds (36-34), 3-2 | Forbes Field (19-12) | 39-27 | Won 2 |
| » Starters: George Suggs vs Claude Hendrix | Third | 14½ out |
| Friday, July 5 |
| » Defeated Reds (36-35), 7-4 | Forbes Field (20-12) | 40-27 | Won 3 |
| » Starters: Bert Humphries vs Marty O'Toole | Third | 14½ out |
| Saturday, July 6 |
| » Lost to Reds (37-35), 2-1 | Forbes Field (20-13) | 40-28 | |
| » Starters: Art Fromme vs Hank Robinson | Third | 15½ out |
| Monday, July 8 |
| » Lost to Phillies (31-35), 5-1 | Forbes Field (20-14) | 40-29 | Lost 2 |
| » Starters: Pete Alexander vs Howie Camnitz | Third | 15 out |
| » Defeated Phillies (31-36), 9-2 | Forbes Field (21-14) | 41-29 | |
| » Starters: Earl Moore vs Claude Hendrix | Third | 15 out |
| Tuesday, July 9 |
| » Defeated Phillies (31-37), 2-0 | Forbes Field (22-14) | 42-29 | Won 2 |
| » Starters: Eppa Rixey vs Marty O'Toole | Third | 15 out |
| Friday, July 12 |
| » Defeated Dodgers (28-46), 8-2 | Forbes Field (23-14) | 43-29 | Won 3 |
| » Starters: Cy Barger vs Claude Hendrix | Third | 13½ out |
| Saturday, July 13 |
| » Lost to Dodgers (29-46), 4-1 | Forbes Field (23-15) | 43-30 | |
| » Starters: Nap Rucker vs Howie Camnitz | Third | 15 out |
| » Lost to Dodgers (30-46), 5-3 | Forbes Field (23-16) | 43-31 | Lost 2 |
| » Starters: Elmer Knetzer vs Marty O'Toole | Third | 15 out |
| Monday, July 15 |
| » Defeated Dodgers (30-47), 4-3 | Forbes Field (24-16) | 44-31 | |
| » Starters: Frank Allen vs Ed Warner | Third | 12½ out |
| » Defeated Dodgers (30-48), 8-4 | Forbes Field (25-16) | 45-31 | Won 2 |
| » Starters: Maury Kent vs Claude Hendrix | Third | 12½ out |
| » Major-league debuts: Ed Mensor (Pirates) |
| Tuesday, July 16 |
| » Defeated Dodgers (30-49), 5-4 | Forbes Field (26-16) | 46-31 | Won 3 |
| » Starters: Earl Yingling vs King Cole | Third | 11½ out |
| Wednesday, July 17 |
| » Lost to Giants (59-20), 10-2 | Forbes Field (26-17) | 46-32 | |
| » Starters: Christy Mathewson vs Howie Camnitz | Third | 12½ out |
| Friday, July 19 |
| » Lost to Giants (60-20), 5-4 | Forbes Field (26-18) | 46-33 | Lost 2 |
| » Starters: Rube Marquard vs Marty O'Toole | Third | 12½ out |
| » Defeated Giants (60-21), 5-4 | Forbes Field (27-18) | 47-33 | |
| » Starters: Red Ames vs Claude Hendrix | Third | 12½ out |
| Saturday, July 20 |
| » Lost to Giants (61-21), 2-1 | Forbes Field (27-19) | 47-34 | |
| » Starters: Jeff Tesreau vs Hank Robinson | Third | 13½ out |
| Monday, July 22 |
| » Defeated Braves (23-63), 2-0 | Forbes Field (28-19) | 48-34 | |
| » Starters: Buster Brown vs Howie Camnitz | Third | 14 out |
| Tuesday, July 23 |
| » Defeated Braves (23-64), 1-0 | Forbes Field (29-19) | 49-34 | Won 2 |
| » Starters: Otto Hess vs Claude Hendrix | Third | 14 out |
| Thursday, July 25 |
| » Defeated Dodgers (32-57), 8-7 | Forbes Field (30-19) | 50-34 | Won 3 |
| » Starters: Eddie Stack vs Ed Warner | Third | 14 out |
| Friday, July 26 |
| » Lost to Phillies (42-41), 4-1 | Baker Bowl (1-3) | 50-35 | |
| » Starters: Marty O'Toole vs Earl Moore | Third | 14 out |
| Saturday, July 27 |
| » Lost to Phillies (43-41), 5-3 | Baker Bowl (1-4) | 50-36 | Lost 2 |
| » Starters: Claude Hendrix vs Ad Brennan | Third | 14 out |
| Monday, July 29 |
| » Lost to Phillies (44-41), 4-1 | Baker Bowl (1-5) | 50-37 | Lost 3 |
| » Starters: Howie Camnitz vs Pete Alexander | Third | 14 out |
| Tuesday, July 30 |
| » Defeated Phillies (44-42), 3-2 | Baker Bowl (2-5) | 51-37 | |
| » Starters: Babe Adams vs Eppa Rixey | Third | 14 out |
| Future Pirate Johnny Rizzo is born in Houston, TX. |
| Wednesday, July 31 |
| » Defeated Braves (25-66), 7-6 | South End Grounds III (4-0) | 52-37 | Won 2 |
| » Starters: Marty O'Toole vs Otto Hess | Third | 14 out |
| Thursday, August 1 |
| » Defeated Braves (25-67), 1-0 | South End Grounds III (5-0) | 53-37 | Won 3 |
| » Starters: Claude Hendrix vs Buster Brown | Third | 14½ out |
| Friday, August 2 |
| » Defeated Braves (25-68), 3-0 | South End Grounds III (6-0) | 54-37 | Won 4 |
| » Starters: Ed Warner vs Walt Dickson | Third | 14½ out |
| Saturday, August 3 |
| » Lost to Braves (26-68), 13-4 | South End Grounds III (6-1) | 54-38 | |
| » Starters: Babe Adams vs Hub Perdue | Third | 15 out |
| » Defeated Braves (26-69), 8-3 | South End Grounds III (7-1) | 55-38 | |
| » Starters: Marty O'Toole vs Lefty Tyler | Third | 15 out |
| Monday, August 5 |
| » Defeated Giants (71-25), 8-4 | Polo Grounds V (4-1) | 56-38 | Won 2 |
| » Starters: Claude Hendrix vs Rube Marquard | Third | 14 out |
| Tuesday, August 6 |
| » Defeated Giants (71-26), 7-2 | Polo Grounds V (5-1) | 57-38 | Won 3 |
| » Starters: Howie Camnitz vs Jeff Tesreau | Third | 13 out |
| Future Pirate Bud Hafey is born in Berkeley, CA. |
| Wednesday, August 7 |
| » Defeated Giants (71-27), 7-2 | Polo Grounds V (6-1) | 58-38 | Won 4 |
| » Starters: Marty O'Toole vs Christy Mathewson | Third | 12 out |
| Thursday, August 8 |
| » Lost to Giants (72-27), 2-1 | Polo Grounds V (6-2) | 58-39 | |
| » Starters: Claude Hendrix vs Rube Marquard | Third | 13 out |
| Friday, August 9 |
| » Defeated Dodgers (37-66), 2-1 | Washington Park III (4-1) | 59-39 | |
| » Starters: Hank Robinson vs Frank Allen | Third | 12 out |
| Saturday, August 10 |
| » Lost to Dodgers (38-66), 7-5 | Washington Park III (4-2) | 59-40 | |
| » Starters: Marty O'Toole vs Cliff Curtis | Third | 13 out |
| Monday, August 12 |
| » Defeated Dodgers (38-67), 5-3 | Washington Park III (5-2) | 60-40 | |
| » Starters: Babe Adams vs Nap Rucker | Third | 12 out |
| Tuesday, August 13 |
| » Defeated Dodgers (38-68), 3-1 | Washington Park III (6-2) | 61-40 | Won 2 |
| » Starters: Hank Robinson vs Earl Yingling | Third | 11½ out |
| Wednesday, August 14 |
| » Defeated Phillies (50-51), 3-2 | Forbes Field (31-19) | 62-40 | Won 3 |
| » Starters: Earl Moore vs Howie Camnitz | Third | 10½ out |
| » Defeated Phillies (50-52), 2-1 | Forbes Field (32-19) | 63-40 | Won 4 |
| » Starters: Pete Alexander vs Claude Hendrix | Third | 10½ out |
| Thursday, August 15 |
| » Defeated Phillies (50-53), 7-1 | Forbes Field (33-19) | 64-40 | Won 5 |
| » Starters: Eppa Rixey vs Marty O'Toole | Third | 9 out |
| » Defeated Phillies (50-54), 4-0 | Forbes Field (34-19) | 65-40 | Won 6 |
| » Starters: Tom Seaton vs Babe Adams | Third | 9 out |
| Friday, August 16 |
| » Lost to Phillies (51-54), 5-3 | Forbes Field (34-20) | 65-41 | |
| » Starters: Pete Alexander vs Claude Hendrix | Third | 10 out |
| Saturday, August 17 |
| » Lost to Phillies (52-54), 2-0 | Forbes Field (34-21) | 65-42 | Lost 2 |
| » Starters: Earl Moore vs Howie Camnitz | Third | 10 out |
| Tuesday, August 20 |
| » Defeated Dodgers (39-72), 3-2 | Forbes Field (35-21) | 66-42 | |
| » Starters: Eddie Stack vs Hank Robinson | Third | 11½ out |
| » Lost to Dodgers (40-72), 9-1 | Forbes Field (35-22) | 66-43 | |
| » Starters: Pat Ragan vs Marty O'Toole | Third | 11½ out |
| Wednesday, August 21 |
| » Lost to Dodgers (41-72), 1-0 | Forbes Field (35-23) | 66-44 | Lost 2 |
| » Starters: Nap Rucker vs Babe Adams | Third | 11½ out |
| Thursday, August 22 |
| » Defeated Giants (77-33), 3-2 | Forbes Field (36-23) | 67-44 | |
| » Starters: Christy Mathewson vs Howie Camnitz | Third | 11½ out |
| » Lost to Giants (78-33), 8-6 | Forbes Field (36-24) | 67-45 | |
| » Starters: Rube Marquard vs Claude Hendrix | Third | 11½ out |
| Friday, August 23 |
| » Lost to Giants (79-33), 2-1 | Forbes Field (36-25) | 67-46 | Lost 2 |
| » Starters: Red Ames vs Hank Robinson | Third | 13½ out |
| » Lost to Giants (80-33), 3-2 | Forbes Field (36-26) | 67-47 | Lost 3 |
| » Starters: Jeff Tesreau vs Marty O'Toole | Third | 13½ out |
| Saturday, August 24 |
| » Lost to Giants (81-33), 3-2 | Forbes Field (36-27) | 67-48 | Lost 4 |
| » Starters: Hooks Wiltse vs Babe Adams | Third | 14½ out |
| Sunday, August 25 |
| » Major-league debuts: Frank Snyder (Cardinals) |
| Monday, August 26 |
| » Defeated Braves (34-81), 5-4 | Forbes Field (37-27) | 68-48 | |
| » Starters: Otto Hess vs Claude Hendrix | Third | 14 out |
| » Lost to Braves (35-81), 8-4 | Forbes Field (37-28) | 68-49 | |
| » Starters: Ed Donnelly vs King Cole | Third | 14 out |
| Tuesday, August 27 |
| » Defeated Braves (35-82), 9-4 | Forbes Field (38-28) | 69-49 | |
| » Starters: Walt Dickson vs Howie Camnitz | Third | 13 out |
| Thursday, August 29 |
| » Lost to Reds (57-63), 7-2 | Forbes Field (38-29) | 69-50 | |
| » Starters: George Suggs vs Marty O'Toole | Third | 14 out |
| » Major-league debuts: Wilbur Cooper (Pirates) |
| Friday, August 30 |
| » Defeated Reds (57-64), 2-1 | Forbes Field (39-29) | 70-50 | |
| » Starters: Rube Benton vs Babe Adams | Third | 13 out |
| Saturday, August 31 |
| » Defeated Reds (57-65), 4-0 | Forbes Field (40-29) | 71-50 | Won 2 |
| » Starters: Frank Harter vs Jack Ferry | Third | 12½ out |
| Sunday, September 1 |
| » Lost to Reds (58-65), 2-1 | Crosley Field (2-6) | 71-51 | |
| » Starters: Howie Camnitz vs Gene Moore | Third | 13½ out |
| » Lost to Reds (59-65), 11-6 | Crosley Field (2-7) | 71-52 | Lost 2 |
| » Starters: King Cole vs Bill Doak | Third | 13½ out |
| » Major-league debuts: Bill Doak (Reds) |
| Tuesday, September 3 |
| » Lost to Cubs (80-43), 5-2 | Forbes Field (40-30) | 71-53 | Lost 3 |
| » Starters: Larry Cheney vs Babe Adams | Third | 14 out |
| » Defeated Cubs (80-44), 1-0 | Forbes Field (41-30) | 72-53 | |
| » Starters: Lew Richie vs Claude Hendrix | Third | 14 out |
| Wednesday, September 4 |
| » Defeated Cubs (80-45), 5-2 | West Side Grounds (5-3) | 73-53 | Won 2 |
| » Starters: Marty O'Toole vs Jimmy Lavender | Third | 13½ out |
| Thursday, September 5 |
| » Defeated Cardinals (55-73), 5-4 | Robison Field (5-3) | 74-53 | Won 3 |
| » Starters: Jack Ferry vs Bob Harmon | Third | 14 out |
| Friday, September 6 |
| » Defeated Cardinals (55-74), 8-0 | Robison Field (6-3) | 75-53 | Won 4 |
| » Starters: Wilbur Cooper vs Dan Griner | Third | 14½ out |
| Future Pirate Vince DiMaggio is born in Martinez, CA. |
| Saturday, September 7 |
| » Defeated Cardinals (55-75), 8-1 | Robison Field (7-3) | 76-53 | Won 5 |
| » Starters: Hank Robinson vs Sandy Burk | Third | 13½ out |
| » Major-league debuts: Pol Perritt (Cardinals) |
| Sunday, September 8 |
| » Defeated Cardinals (55-76), 12-8 | Robison Field (8-3) | 77-53 | Won 6 |
| » Starters: Marty O'Toole vs Bill Steele | Third | 13 out |
| Tuesday, September 10 |
| » Defeated Phillies (63-67), 11-4 | Baker Bowl (3-5) | 78-53 | Won 7 |
| » Starters: Babe Adams vs Earl Moore | Third | 14 out |
| Wednesday, September 11 |
| » Defeated Phillies (63-68), 10-3 | Baker Bowl (4-5) | 79-53 | Won 8 |
| » Starters: Jack Ferry vs George Chalmers | Third | 13½ out |
| Thursday, September 12 |
| » Defeated Phillies (63-69), 7-3 | Baker Bowl (5-5) | 80-53 | Won 9 |
| » Starters: Claude Hendrix vs Pete Alexander | Third | 13 out |
| Friday, September 13 |
| » Defeated Phillies (63-70), 6-5 | Baker Bowl (6-5) | 81-53 | Won 10 |
| » Starters: Marty O'Toole vs Tom Seaton | Third | 13 out |
| Saturday, September 14 |
| » Defeated Dodgers (50-85), 6-2 | Washington Park III (7-2) | 82-53 | Won 11 |
| » Starters: Wilbur Cooper vs Frank Allen | Third | 13 out |
| Monday, September 16 |
| » Defeated Dodgers (50-86), 2-1 | Washington Park III (8-2) | 83-53 | Won 12 |
| » Starters: Hank Robinson vs Pat Ragan | Third | 12 out |
| Tuesday, September 17 |
| » Lost to Dodgers (51-86), 7-3 | Washington Park III (8-3) | 83-54 | |
| » Starters: Claude Hendrix vs Nap Rucker | Third | 12 out |
| Wednesday, September 18 |
| » Defeated Braves (44-94), 9-1 | South End Grounds III (8-1) | 84-54 | |
| » Starters: Howie Camnitz vs Ed Donnelly | Third | 11½ out |
| » Tied Braves, 0-0 | South End Grounds III (8-1) | 84-54 | |
| » Starters: Marty O'Toole vs Lefty Tyler | Third | 11½ out |
| Thursday, September 19 |
| » Lost to Braves (45-94), 7-5 | South End Grounds III (8-2) | 84-55 | |
| » Starters: Wilbur Cooper vs Otto Hess | Third | 11 out |
| » Defeated Braves (45-95), 8-7 | South End Grounds III (9-2) | 85-55 | |
| » Starters: Claude Hendrix vs Walt Dickson | Third | 11 out |
| Friday, September 20 |
| » Defeated Braves (45-96), 10-2 | South End Grounds III (10-2) | 86-55 | Won 2 |
| » Starters: Hank Robinson vs Hub Perdue | Third | 10½ out |
| Saturday, September 21 |
| » Lost to Giants (97-44), 2-1 | Polo Grounds V (6-3) | 86-56 | |
| » Starters: Howie Camnitz vs Jeff Tesreau | Third | 11½ out |
| Monday, September 23 |
| » Major-league debuts: Ted Cather (Cardinals) |
| Wednesday, September 25 |
| » Defeated Cardinals (59-86), 4-0 | Forbes Field (42-30) | 87-56 | |
| » Starters: Rube Geyer vs Marty O'Toole | Third | 11 out |
| Thursday, September 26 |
| » Defeated Cardinals (59-87), 7-5 | Forbes Field (43-30) | 88-56 | Won 2 |
| » Starters: Bill Steele vs Hank Robinson | Third | 11½ out |
| Friday, September 27 |
| » Defeated Cardinals (59-88), 4-0 | Forbes Field (44-30) | 89-56 | Won 3 |
| » Starters: Pol Perritt vs Wilbur Cooper | Third | 11½ out |
| Saturday, September 28 |
| » Lost to Cardinals (60-88), 4-2 | Forbes Field (44-31) | 89-57 | |
| » Starters: Sandy Burk vs Howie Camnitz | Third | 11½ out |
| Sunday, September 29 |
| » Defeated Cubs (89-57), 9-0 | West Side Grounds (6-3) | 90-57 | |
| » Starters: Marty O'Toole vs Lew Richie | Second | 11 out |
| Monday, September 30 |
| » Defeated Cubs (89-58), 9-3 | West Side Grounds (7-3) | 91-57 | Won 2 |
| » Starters: Claude Hendrix vs Larry Cheney | Second | 11 out |
| Tuesday, October 1 |
| » Defeated Cubs (89-59), 4-1 | West Side Grounds (8-3) | 92-57 | Won 3 |
| » Starters: Babe Adams vs Larry Cheney | Second | 10 out |
| Saturday, October 5 |
| » Lost to Reds (75-77), 6-5 | Crosley Field (2-8) | 92-58 | |
| » Starters: Marty O'Toole vs Art Fromme | Second | 10½ out |
| Sunday, October 6 |
| » Defeated Reds (75-78), 16-6 | Crosley Field (3-8) | 93-58 | |
| » Starters: Howie Camnitz vs Rube Benton | Second | 10 out |
| Sunday, December 1 |
| Future Pirate Cookie Lavagetto is born in Oakland, CA. |
| Friday, December 27 |
| Future Pirate Jim Tobin is born in Oakland, CA. |
Game information provided by Retrosheet (www.retrosheet.org) |
