| Tuesday, January 10 |
| Future Pirate Cliff Chambers is born. |
| Wednesday, February 8 |
| Future Pirate Monty Basgall is born in Pfeifer, KS. |
| Sunday, February 12 |
| Future Pirate Woody Main is born in Delano, CA. |
| Wednesday, March 8 |
| Future Pirate Al Gionfriddo is born in Dysart, PA. |
| Wednesday, April 12 |
| » Lost to Cardinals (1-0), 10-1 | Sportsman's Park III (0-1) | 0-1 | |
| » Starters: Wilbur Cooper vs Bill Sherdel | Second | 1 out |
| Thursday, April 13 |
| » Lost to Cardinals (2-0), 8-4 | Sportsman's Park III (0-2) | 0-2 | Lost 2 |
| » Starters: Whitey Glazner vs Bill Doak | Third | 2 out |
| » Major-league debuts: Clyde Barfoot (Cardinals) |
| Saturday, April 15 |
| » Lost to Cardinals (3-0), 3-2 | Sportsman's Park III (0-3) | 0-3 | Lost 3 |
| » Starters: Babe Adams vs Jesse Haines | Sixth | 3 out |
| Sunday, April 16 |
| » Defeated Reds (1-3), 4-3 | Crosley Field (1-0) | 1-3 | |
| » Starters: Wilbur Cooper vs Eppa Rixey | Sixth | 3 out |
| Monday, April 17 |
| » Defeated Reds (1-4), 1-0 | Crosley Field (2-0) | 2-3 | Won 2 |
| » Starters: Johnny Morrison vs Dolf Luque | Third | 2 out |
| Tuesday, April 18 |
| » Defeated Reds (1-5), 8-4 | Crosley Field (3-0) | 3-3 | Won 3 |
| » Starters: Hal Carlson vs Cliff Markle | Fourth | 1½ out |
| Thursday, April 20 |
| » Defeated Cardinals (4-3), 10-5 | Forbes Field (1-0) | 4-3 | Won 4 |
| » Starters: Bill Sherdel vs Wilbur Cooper | Fourth | 1½ out |
| Saturday, April 22 |
| » Defeated Cardinals (4-4), 14-2 | Forbes Field (2-0) | 5-3 | Won 5 |
| » Starters: Jesse Haines vs Johnny Morrison | Third | 1½ out |
| Sunday, April 23 |
| » Defeated Cubs (7-3), 14-3 | Wrigley Field (1-0) | 6-3 | Won 6 |
| » Starters: Hal Carlson vs Percy Jones | Third | 1 out |
| Monday, April 24 |
| » Lost to Cubs (8-3), 4-2 | Wrigley Field (1-1) | 6-4 | |
| » Starters: Wilbur Cooper vs Vic Aldridge | Third | 2 out |
| Wednesday, April 26 |
| » Lost to Cubs (9-3), 4-3 | Wrigley Field (1-2) | 6-5 | Lost 2 |
| » Starters: Babe Adams vs Pete Alexander | Second | 2½ out |
| Thursday, April 27 |
| » Lost to Reds (3-10), 8-5 | Forbes Field (2-1) | 6-6 | Lost 3 |
| » Starters: Dolf Luque vs Johnny Morrison | Second | 3½ out |
| Friday, April 28 |
| » Lost to Reds (4-10), 5-3 | Forbes Field (2-2) | 6-7 | Lost 4 |
| » Starters: Johnny Couch vs Hal Carlson | Fifth | 4½ out |
| Saturday, April 29 |
| » Defeated Reds (4-11), 7-3 | Forbes Field (3-2) | 7-7 | |
| » Starters: Eppa Rixey vs Wilbur Cooper | Third | 4½ out |
| » Major-league debuts: Jewel Ens (Pirates) |
| Sunday, April 30 |
| » Lost to Reds (5-11), 3-1 | Crosley Field (3-1) | 7-8 | |
| » Starters: Whitey Glazner vs Pete Donohue | Fifth | 5 out |
| Monday, May 1 |
| » Defeated Reds (5-12), 7-6 | Crosley Field (4-1) | 8-8 | |
| » Starters: Johnny Morrison vs Dolf Luque | Fifth | 5 out |
| Tuesday, May 2 |
| » Lost to Reds (6-12), 9-2 | Crosley Field (4-2) | 8-9 | |
| » Starters: Hal Carlson vs Johnny Couch | Fifth | 6 out |
| Friday, May 5 |
| » Defeated Cubs (11-6), 3-1 | Forbes Field (4-2) | 9-9 | |
| » Starters: Percy Jones vs Wilbur Cooper | Fifth | 5 out |
| Saturday, May 6 |
| » Lost to Cubs (12-6), 11-7 | Forbes Field (4-3) | 9-10 | |
| » Starters: Vic Aldridge vs Whitey Glazner | Fifth | 6 out |
| Sunday, May 7 |
| » Defeated Cubs (12-7), 11-5 | Wrigley Field (2-2) | 10-10 | |
| » Starters: Hal Carlson vs Pete Alexander | Fifth | 6 out |
| » Major-league debuts: Walter Mueller (Pirates) |
| Monday, May 8 |
| » Defeated Dodgers (10-10), 8-7 | Forbes Field (5-3) | 11-10 | Won 2 |
| » Starters: Burleigh Grimes vs Johnny Morrison | Fourth | 5½ out |
| Tuesday, May 9 |
| » Defeated Dodgers (10-11), 8-2 | Forbes Field (6-3) | 12-10 | Won 3 |
| » Starters: Leon Cadore vs Wilbur Cooper | Fourth | 5½ out |
| Thursday, May 11 |
| » Defeated Dodgers (10-12), 12-6 | Forbes Field (7-3) | 13-10 | Won 4 |
| » Starters: Dutch Ruether vs Babe Adams | Second | 5 out |
| Friday, May 12 |
| » Defeated Braves (6-16), 5-3 | Forbes Field (8-3) | 14-10 | Won 5 |
| » Starters: Mule Watson vs Hal Carlson | Second | 4 out |
| Future Pirate Johnny Hetki is born in Leavenworth, KS. |
| Saturday, May 13 |
| » Lost to Braves (7-16), 8-5 | Forbes Field (8-4) | 14-11 | |
| » Starters: Hugh McQuillan vs Wilbur Cooper | Third | 4 out |
| Monday, May 15 |
| » Defeated Braves (7-17), 6-5 | Forbes Field (9-4) | 15-11 | |
| » Starters: Dana Fillingim vs Whitey Glazner | Third | 4½ out |
| Tuesday, May 16 |
| » Lost to Braves (8-17), 7-5 | Forbes Field (9-5) | 15-12 | |
| » Starters: Rube Marquard vs Johnny Morrison | Third | 4½ out |
| Saturday, May 20 |
| » Defeated Giants (20-9), 10-7 | Forbes Field (10-5) | 16-12 | |
| » Starters: Phil Douglas vs Babe Adams | Third | 3½ out |
| Monday, May 22 |
| » Defeated Phillies (11-17), 5-0 | Forbes Field (11-5) | 17-12 | Won 2 |
| » Starters: Bill Hubbell vs Wilbur Cooper | Second | 2 out |
| Tuesday, May 23 |
| » Defeated Phillies (11-18), 10-3 | Forbes Field (12-5) | 18-12 | Won 3 |
| » Starters: George Smith vs Johnny Morrison | Second | 1 out |
| Wednesday, May 24 |
| » Defeated Phillies (11-19), 11-4 | Forbes Field (13-5) | 19-12 | Won 4 |
| » Starters: Jimmy Ring vs Hal Carlson | Second | 1 out |
| Thursday, May 25 |
| » Defeated Cardinals (19-17), 7-3 | Sportsman's Park III (1-3) | 20-12 | Won 5 |
| » Starters: Whitey Glazner vs Bill Sherdel | Second | ½ out |
| Friday, May 26 |
| » Lost to Cardinals (20-17), 6-2 | Sportsman's Park III (1-4) | 20-13 | |
| » Starters: Wilbur Cooper vs Bill Doak | Second | 2 out |
| Saturday, May 27 |
| » Lost to Cardinals (21-17), 3-2 | Sportsman's Park III (1-5) | 20-14 | Lost 2 |
| » Starters: Babe Adams vs Bill Sherdel | Second | 2½ out |
| » Defeated Cardinals (21-18), 3-2 | Sportsman's Park III (2-5) | 21-14 | |
| » Starters: Earl Hamilton vs Jeff Pfeffer | Second | 2½ out |
| Sunday, May 28 |
| » Lost to Cardinals (22-18), 4-3 | Sportsman's Park III (2-6) | 21-15 | |
| » Starters: Hal Carlson vs Bill Pertica | Second | 3½ out |
| Monday, May 29 |
| » Defeated Reds (21-22), 5-2 | Forbes Field (14-5) | 22-15 | |
| » Starters: Pete Donohue vs Whitey Glazner | Second | 2½ out |
| Tuesday, May 30 |
| » Lost to Reds (22-22), 9-3 | Forbes Field (14-6) | 22-16 | |
| » Starters: Eppa Rixey vs Wilbur Cooper | Second | 2½ out |
| » Defeated Reds (22-23), 7-3 | Forbes Field (15-6) | 23-16 | |
| » Starters: Cactus Keck vs Johnny Morrison | Second | 2½ out |
| Wednesday, May 31 |
| » Defeated Reds (22-24), 11-2 | Forbes Field (16-6) | 24-16 | Won 2 |
| » Starters: Johnny Couch vs Earl Hamilton | Second | 1½ out |
| Former Pirate John Coleman dies in Detroit, MI at the age of 60. |
| Thursday, June 1 |
| » Lost to Cardinals (24-20), 3-2 | Forbes Field (16-7) | 24-17 | |
| » Starters: Jeff Pfeffer vs Hal Carlson | Second | 1½ out |
| Saturday, June 3 |
| » Lost to Cardinals (25-20), 9-6 | Forbes Field (16-8) | 24-18 | Lost 2 |
| » Starters: Bill Doak vs Whitey Glazner | Second | 1 out |
| Wednesday, June 7 |
| » Defeated Phillies (15-29), 5-0 | Baker Bowl (1-0) | 25-18 | |
| » Starters: Johnny Morrison vs Lee Meadows | Second | 1½ out |
| Thursday, June 8 |
| » Defeated Phillies (15-30), 7-5 | Baker Bowl (2-0) | 26-18 | Won 2 |
| » Starters: Hal Carlson vs Jimmy Ring | Second | 1½ out |
| Friday, June 9 |
| » Lost to Braves (21-26), 7-3 | Braves Field (0-1) | 26-19 | |
| » Starters: Wilbur Cooper vs Joe Oeschger | Second | 1½ out |
| Saturday, June 10 |
| » Defeated Braves (21-27), 9-1 | Braves Field (1-1) | 27-19 | |
| » Starters: Whitey Glazner vs Mule Watson | Second | 1½ out |
| Monday, June 12 |
| » Lost to Braves (22-27), 11-2 | Braves Field (1-2) | 27-20 | |
| » Starters: Johnny Morrison vs Frank Miller | Second | 3 out |
| Tuesday, June 13 |
| » Lost to Braves (23-27), 8-5 | Braves Field (1-3) | 27-21 | Lost 2 |
| » Starters: Earl Hamilton vs Dana Fillingim | Second | 4 out |
| Wednesday, June 14 |
| » Lost to Giants (34-19), 13-0 | Polo Grounds V (0-1) | 27-22 | Lost 3 |
| » Starters: Hal Carlson vs Phil Douglas | Second | 5 out |
| Thursday, June 15 |
| » Lost to Giants (35-19), 4-2 | Polo Grounds V (0-2) | 27-23 | Lost 4 |
| » Starters: Babe Adams vs Rosy Ryan | Third | 6 out |
| Friday, June 16 |
| » Lost to Giants (36-19), 7-1 | Polo Grounds V (0-3) | 27-24 | Lost 5 |
| » Starters: Whitey Glazner vs Jesse Barnes | Third | 7 out |
| Future Pirate Max Surkont is born in Central Falls, RI. |
| Saturday, June 17 |
| » Lost to Giants (37-19), 2-1 | Polo Grounds V (0-4) | 27-25 | Lost 6 |
| » Starters: Johnny Morrison vs Art Nehf | Third | 8 out |
| Sunday, June 18 |
| » Defeated Dodgers (30-29), 2-0 | Ebbets Field (1-0) | 28-25 | |
| » Starters: Wilbur Cooper vs Dutch Ruether | Third | 7 out |
| Monday, June 19 |
| » Lost to Dodgers (31-29), 6-5 | Ebbets Field (1-1) | 28-26 | |
| » Starters: Whitey Glazner vs Dazzy Vance | Third | 7 out |
| Wednesday, June 21 |
| » Lost to Dodgers (32-29), 15-14 | Ebbets Field (1-2) | 28-27 | Lost 2 |
| » Starters: Hal Carlson vs Leon Cadore | Fourth | 7½ out |
| Thursday, June 22 |
| » Defeated Cubs (28-30), 8-6 | Forbes Field (17-8) | 29-27 | |
| » Starters: Pete Alexander vs Wilbur Cooper | Fourth | 6½ out |
| Friday, June 23 |
| » Lost to Reds (30-32), 6-2 | Forbes Field (17-9) | 29-28 | |
| » Starters: Eppa Rixey vs Johnny Morrison | Fourth | 7½ out |
| Saturday, June 24 |
| » Lost to Reds (31-32), 7-3 | Forbes Field (17-10) | 29-29 | Lost 2 |
| » Starters: Dolf Luque vs Whitey Glazner | Fourth | 7½ out |
| Sunday, June 25 |
| » Lost to Reds (32-32), 7-4 | Crosley Field (4-3) | 29-30 | Lost 3 |
| » Starters: Hal Carlson vs Johnny Couch | Fifth | 8½ out |
| Monday, June 26 |
| » Lost to Cubs (31-31), 6-4 | Wrigley Field (2-3) | 29-31 | Lost 4 |
| » Starters: Johnny Morrison vs George Stueland | Sixth | 9 out |
| Tuesday, June 27 |
| » Defeated Cubs (31-32), 6-1 | Wrigley Field (3-3) | 30-31 | |
| » Starters: Wilbur Cooper vs Virgil Cheeves | Fourth | 8½ out |
| » Defeated Cubs (31-33), 7-6 | Wrigley Field (4-3) | 31-31 | Won 2 |
| » Starters: Whitey Glazner vs Pete Alexander | Fourth | 8½ out |
| Wednesday, June 28 |
| » Defeated Cubs (31-34), 7-2 | Wrigley Field (5-3) | 32-31 | Won 3 |
| » Starters: Earl Hamilton vs Vic Aldridge | Fourth | 8 out |
| Thursday, June 29 |
| » Lost to Cardinals (36-29), 8-5 | Forbes Field (17-11) | 32-32 | |
| » Starters: Jesse Haines vs Whitey Glazner | Fourth | 9 out |
| Friday, June 30 |
| » Lost to Cardinals (37-29), 6-0 | Forbes Field (17-12) | 32-33 | Lost 2 |
| » Starters: Bill Sherdel vs Johnny Morrison | Fifth | 10 out |
| Saturday, July 1 |
| » Lost to Cardinals (38-29), 9-5 | Forbes Field (17-13) | 32-34 | Lost 3 |
| » Manager: Bill McKechnie |
| » Starters: Bill Doak vs Wilbur Cooper | Fifth | 10 out |
| » Defeated Cardinals (38-30), 9-8 | Forbes Field (18-13) | 33-34 | |
| » Starters: Bill Pertica vs Babe Adams | Fifth | 10 out |
| Sunday, July 2 |
| » Lost to Cubs (33-35), 5-1 | Wrigley Field (5-4) | 33-35 | |
| » Starters: Earl Hamilton vs Pete Alexander | Fifth | 10½ out |
| Monday, July 3 |
| » Defeated Cubs (33-36), 5-2 | Forbes Field (19-13) | 34-35 | |
| » Starters: George Stueland vs Chief Yellowhorse | Fourth | 10½ out |
| Tuesday, July 4 |
| » Lost to Cubs (34-36), 8-4 | Forbes Field (19-14) | 34-36 | |
| » Starters: Virgil Cheeves vs Whitey Glazner | Sixth | 11½ out |
| » Lost to Cubs (35-36), 8-0 | Forbes Field (19-15) | 34-37 | Lost 2 |
| » Starters: Vic Aldridge vs Johnny Morrison | Sixth | 11½ out |
| Wednesday, July 5 |
| » Lost to Cubs (36-36), 11-5 | Forbes Field (19-16) | 34-38 | Lost 3 |
| » Starters: Percy Jones vs Hal Carlson | Sixth | 12 out |
| Thursday, July 6 |
| » Lost to Giants (45-24), 6-3 | Forbes Field (19-17) | 34-39 | Lost 4 |
| » Starters: Art Nehf vs Babe Adams | Sixth | 13 out |
| Friday, July 7 |
| » Lost to Giants (46-24), 9-8 | Forbes Field (19-18) | 34-40 | Lost 5 |
| » Starters: Jesse Barnes vs Chief Yellowhorse | Sixth | 14 out |
| Saturday, July 8 |
| » Defeated Giants (46-25), 7-5 | Forbes Field (20-18) | 35-40 | |
| » Starters: Fred Toney vs Wilbur Cooper | Sixth | 13 out |
| Monday, July 10 |
| » Lost to Giants (47-25), 19-2 | Forbes Field (20-19) | 35-41 | |
| » Starters: Art Nehf vs Earl Hamilton | Sixth | 13 out |
| » Defeated Giants (47-26), 5-4 | Forbes Field (21-19) | 36-41 | |
| » Starters: Rosy Ryan vs Hal Carlson | Sixth | 13 out |
| Tuesday, July 11 |
| » Lost to Braves (27-48), 10-4 | Forbes Field (21-20) | 36-42 | |
| » Starters: Hugh McQuillan vs Johnny Morrison | Sixth | 14 out |
| Wednesday, July 12 |
| » Lost to Braves (28-48), 4-3 | Forbes Field (21-21) | 36-43 | Lost 2 |
| » Starters: Mule Watson vs Chief Yellowhorse | Sixth | 15 out |
| Friday, July 14 |
| » Defeated Braves (28-49), 6-1 | Forbes Field (22-21) | 37-43 | |
| » Starters: Rube Marquard vs Wilbur Cooper | Sixth | 13½ out |
| Saturday, July 15 |
| » Defeated Dodgers (41-42), 3-2 | Forbes Field (23-21) | 38-43 | Won 2 |
| » Starters: Dutch Ruether vs Babe Adams | Sixth | 12½ out |
| Sunday, July 16 |
| » Lost to Dodgers (42-42), 6-2 | Ebbets Field (1-3) | 38-44 | |
| » Starters: Hal Carlson vs Burleigh Grimes | Sixth | 12½ out |
| » Major-league debuts: Jake Miller (Pirates) |
| Monday, July 17 |
| » Defeated Dodgers (42-43), 8-5 | Forbes Field (24-21) | 39-44 | |
| » Starters: Al Mamaux vs Chief Yellowhorse | Sixth | 12½ out |
| Wednesday, July 19 |
| » Defeated Phillies (31-50), 2-0 | Forbes Field (25-21) | 40-44 | Won 2 |
| » Starters: Bill Hubbell vs Wilbur Cooper | Sixth | 12 out |
| Thursday, July 20 |
| » Defeated Phillies (31-51), 2-1 | Forbes Field (26-21) | 41-44 | Won 3 |
| » Starters: Lefty Weinert vs Whitey Glazner | Sixth | 12 out |
| Friday, July 21 |
| » Defeated Phillies (31-52), 6-0 | Forbes Field (27-21) | 42-44 | Won 4 |
| » Starters: Jimmy Ring vs Johnny Morrison | Sixth | 11 out |
| Saturday, July 22 |
| » Defeated Phillies (31-53), 8-7 | Forbes Field (28-21) | 43-44 | Won 5 |
| » Starters: Lee Meadows vs Hal Carlson | Fifth | 11½ out |
| Monday, July 24 |
| » Defeated Giants (53-34), 3-2 | Forbes Field (29-21) | 44-44 | Won 6 |
| » Starters: Jesse Barnes vs Wilbur Cooper | Fifth | 10½ out |
| » Lost to Giants (54-34), 11-4 | Forbes Field (29-22) | 44-45 | |
| » Starters: Art Nehf vs Babe Adams | Fifth | 10½ out |
| Tuesday, July 25 |
| » Defeated Dodgers (44-47), 5-3 | Ebbets Field (2-3) | 45-45 | |
| » Starters: Johnny Morrison vs Burleigh Grimes | Fifth | 10½ out |
| Wednesday, July 26 |
| » Lost to Dodgers (45-47), 7-0 | Ebbets Field (2-4) | 45-46 | |
| » Starters: Whitey Glazner vs Dutch Ruether | Fifth | 11½ out |
| Friday, July 28 |
| » Lost to Dodgers (46-47), 3-2 | Ebbets Field (2-5) | 45-47 | Lost 2 |
| » Starters: Babe Adams vs Dazzy Vance | Sixth | 12½ out |
| Saturday, July 29 |
| » Defeated Giants (58-36), 8-3 | Polo Grounds V (1-4) | 46-47 | |
| » Starters: Wilbur Cooper vs Fred Toney | Sixth | 11½ out |
| Sunday, July 30 |
| » Defeated Giants (58-37), 7-0 | Polo Grounds V (2-4) | 47-47 | Won 2 |
| » Starters: Johnny Morrison vs Phil Douglas | Fifth | 10½ out |
| Monday, July 31 |
| » Defeated Giants (58-38), 12-5 | Polo Grounds V (3-4) | 48-47 | Won 3 |
| » Starters: Earl Hamilton vs Jesse Barnes | Fifth | 9½ out |
| Tuesday, August 1 |
| » Defeated Giants (58-39), 10-2 | Polo Grounds V (4-4) | 49-47 | Won 4 |
| » Starters: Wilbur Cooper vs Rosy Ryan | Fifth | 8½ out |
| Thursday, August 3 |
| » Defeated Braves (33-63), 5-1 | Braves Field (2-3) | 50-47 | Won 5 |
| » Starters: Whitey Glazner vs Mule Watson | Fifth | 8½ out |
| Friday, August 4 |
| » Defeated Braves (33-64), 3-0 | Braves Field (3-3) | 51-47 | Won 6 |
| » Starters: Babe Adams vs Frank Miller | Fifth | 8½ out |
| Saturday, August 5 |
| » Defeated Braves (33-65), 9-3 | Braves Field (4-3) | 52-47 | Won 7 |
| » Starters: Johnny Morrison vs Rube Marquard | Fourth | 8 out |
| Monday, August 7 |
| » Defeated Phillies (36-60), 17-10 | Baker Bowl (3-0) | 53-47 | Won 8 |
| » Starters: Wilbur Cooper vs Lefty Weinert | Fourth | 7 out |
| Tuesday, August 8 |
| » Defeated Phillies (36-61), 19-8 | Baker Bowl (4-0) | 54-47 | Won 9 |
| » Starters: Earl Hamilton vs Lee Meadows | Third | 5½ out |
| » Defeated Phillies (36-62), 7-3 | Baker Bowl (5-0) | 55-47 | Won 10 |
| » Starters: Johnny Morrison vs Jesse Winters | Third | 5½ out |
| Thursday, August 10 |
| » Defeated Phillies (36-63), 14-4 | Baker Bowl (6-0) | 56-47 | Won 11 |
| » Starters: Hal Carlson vs Jimmy Ring | Third | 5½ out |
| Friday, August 11 |
| » Defeated Reds (58-52), 7-1 | Forbes Field (30-22) | 57-47 | Won 12 |
| » Starters: Dolf Luque vs Wilbur Cooper | Third | 5 out |
| Saturday, August 12 |
| » Defeated Reds (58-53), 6-0 | Forbes Field (31-22) | 58-47 | Won 13 |
| » Starters: Eppa Rixey vs Babe Adams | Third | 4½ out |
| Sunday, August 13 |
| » Lost to Reds (59-53), 5-4 | Crosley Field (4-4) | 58-48 | |
| » Starters: Johnny Morrison vs Johnny Couch | Third | 5½ out |
| Monday, August 14 |
| » Lost to Phillies (38-64), 10-1 | Forbes Field (31-23) | 58-49 | Lost 2 |
| » Starters: Jesse Winters vs Whitey Glazner | Fourth | 6 out |
| Tuesday, August 15 |
| » Defeated Giants (65-45), 6-2 | Forbes Field (32-23) | 59-49 | |
| » Starters: Art Nehf vs Wilbur Cooper | Fourth | 5 out |
| Wednesday, August 16 |
| » Lost to Giants (66-45), 7-6 | Forbes Field (32-24) | 59-50 | |
| » Starters: Jack Scott vs Earl Hamilton | Fourth | 6 out |
| Future Pirate Gene Woodling is born in Akron, OH. |
| Thursday, August 17 |
| » Lost to Giants (67-45), 6-3 | Forbes Field (32-25) | 59-51 | Lost 2 |
| » Starters: Hugh McQuillan vs Johnny Morrison | Third | 7 out |
| Friday, August 18 |
| » Lost to Braves (36-73), 5-2 | Forbes Field (32-26) | 59-52 | Lost 3 |
| » Starters: Frank Miller vs Wilbur Cooper | Fourth | 8 out |
| Saturday, August 19 |
| » Lost to Braves (37-73), 4-1 | Forbes Field (32-27) | 59-53 | Lost 4 |
| » Starters: Garland Braxton vs Babe Adams | Fourth | 7½ out |
| » Defeated Braves (37-74), 8-2 | Forbes Field (33-27) | 60-53 | |
| » Starters: Mule Watson vs Myrl Brown | Fourth | 7½ out |
| Monday, August 21 |
| » Defeated Braves (37-75), 5-1 | Forbes Field (34-27) | 61-53 | Won 2 |
| » Starters: Joe Oeschger vs Earl Hamilton | Fifth | 7½ out |
| Tuesday, August 22 |
| » Defeated Phillies (40-69), 4-3 | Forbes Field (35-27) | 62-53 | Won 3 |
| » Starters: Lee Meadows vs Johnny Morrison | Fourth | 7½ out |
| Wednesday, August 23 |
| » Defeated Phillies (40-70), 11-3 | Forbes Field (36-27) | 63-53 | Won 4 |
| » Starters: Bill Hubbell vs Wilbur Cooper | Fourth | 7 out |
| Thursday, August 24 |
| » Defeated Phillies (40-71), 10-4 | Forbes Field (37-27) | 64-53 | Won 5 |
| » Starters: Jesse Winters vs Myrl Brown | Fourth | 7 out |
| Friday, August 25 |
| » Lost to Dodgers (57-60), 8-7 | Forbes Field (37-28) | 64-54 | |
| » Starters: Burleigh Grimes vs Babe Adams | Fourth | 8½ out |
| » Lost to Dodgers (58-60), 8-6 | Forbes Field (37-29) | 64-55 | Lost 2 |
| » Starters: Leon Cadore vs Whitey Glazner | Fourth | 8½ out |
| Saturday, August 26 |
| » Defeated Dodgers (58-61), 7-5 | Forbes Field (38-29) | 65-55 | |
| » Starters: Art Decatur vs Johnny Morrison | Fourth | 8½ out |
| Monday, August 28 |
| » Defeated Dodgers (58-62), 4-3 | Forbes Field (39-29) | 66-55 | Won 2 |
| » Starters: Dazzy Vance vs Wilbur Cooper | Fifth | 8½ out |
| Tuesday, August 29 |
| » Lost to Dodgers (59-62), 3-2 | Forbes Field (39-30) | 66-56 | |
| » Starters: Dutch Ruether vs Earl Hamilton | Fifth | 8½ out |
| » Defeated Dodgers (59-63), 6-0 | Forbes Field (40-30) | 67-56 | |
| » Starters: Leon Cadore vs Babe Adams | Fifth | 8½ out |
| Wednesday, August 30 |
| » Defeated Reds (68-57), 2-0 | Crosley Field (5-4) | 68-56 | Won 2 |
| » Starters: Whitey Glazner vs Eppa Rixey | Fourth | 7½ out |
| Friday, September 1 |
| » Defeated Cardinals (68-56), 14-4 | Sportsman's Park III (3-6) | 69-56 | Won 3 |
| » Starters: Johnny Morrison vs Bill Doak | Fourth | 6½ out |
| » Lost to Cardinals (69-56), 11-6 | Sportsman's Park III (3-7) | 69-57 | |
| » Starters: Wilbur Cooper vs Epp Sell | Fourth | 6½ out |
| Future Pirate Vic Barnhart is born in Hagerstown, MD. |
| Saturday, September 2 |
| » Defeated Cardinals (69-57), 9-5 | Sportsman's Park III (4-7) | 70-57 | |
| » Starters: Myrl Brown vs Bill Sherdel | Third | 6 out |
| Sunday, September 3 |
| » Defeated Cubs (70-57), 2-0 | Wrigley Field (6-4) | 71-57 | Won 2 |
| » Starters: Earl Hamilton vs Pete Alexander | Second | 6 out |
| Monday, September 4 |
| » Lost to Cardinals (71-57), 5-3 | Forbes Field (40-31) | 71-58 | |
| » Starters: Jeff Pfeffer vs Babe Adams | Second | 6 out |
| » Defeated Cardinals (71-58), 6-5 | Forbes Field (41-31) | 72-58 | |
| » Starters: Bill Pertica vs Whitey Glazner | Second | 6 out |
| Tuesday, September 5 |
| » Defeated Cardinals (71-59), 11-0 | Forbes Field (42-31) | 73-58 | Won 2 |
| » Starters: Epp Sell vs Johnny Morrison | Second | 4½ out |
| Thursday, September 7 |
| » Defeated Cubs (71-60), 6-0 | Forbes Field (43-31) | 74-58 | Won 3 |
| » Starters: George Stueland vs Wilbur Cooper | Second | 4½ out |
| Friday, September 8 |
| » Lost to Cubs (72-60), 10-7 | Forbes Field (43-32) | 74-59 | |
| » Starters: Vic Aldridge vs Earl Hamilton | Second | 4½ out |
| Saturday, September 9 |
| » Defeated Cubs (72-61), 7-4 | Forbes Field (44-32) | 75-59 | |
| » Starters: Pete Alexander vs Whitey Glazner | Second | 4 out |
| » Defeated Cubs (72-62), 8-7 | Forbes Field (45-32) | 76-59 | Won 2 |
| » Starters: Tiny Osborne vs Myrl Brown | Second | 4 out |
| Wednesday, September 13 |
| » Defeated Braves (46-87), 8-1 | Braves Field (5-3) | 77-59 | Won 3 |
| » Starters: Wilbur Cooper vs Joe Oeschger | Second | 5 out |
| » Defeated Braves (46-88), 6-1 | Braves Field (6-3) | 78-59 | Won 4 |
| » Starters: Johnny Morrison vs Johnny Cooney | Second | 5 out |
| Thursday, September 14 |
| » Defeated Braves (46-89), 8-0 | Braves Field (7-3) | 79-59 | Won 5 |
| » Starters: Babe Adams vs Frank Miller | Second | 5 out |
| Friday, September 15 |
| » Lost to Braves (47-89), 4-1 | Braves Field (7-4) | 79-60 | |
| » Starters: Whitey Glazner vs Rube Marquard | Second | 6 out |
| Saturday, September 16 |
| » Defeated Phillies (49-87), 11-6 | Baker Bowl (7-0) | 80-60 | |
| » Starters: Wilbur Cooper vs Lee Meadows | Second | 6 out |
| » Lost to Phillies (50-87), 8-6 | Baker Bowl (7-1) | 80-61 | |
| » Starters: Myrl Brown vs Petie Behan | Second | 6 out |
| Monday, September 18 |
| » Defeated Phillies (50-88), 11-3 | Baker Bowl (8-1) | 81-61 | |
| » Starters: Johnny Morrison vs Bill Hubbell | Second | 6 out |
| » Lost to Phillies (51-88), 5-2 | Baker Bowl (8-2) | 81-62 | |
| » Starters: Johnny Morrison vs Lefty Weinert | Second | 6 out |
| Tuesday, September 19 |
| » Defeated Phillies (51-89), 6-1 | Baker Bowl (9-2) | 82-62 | |
| » Starters: Whitey Glazner vs Jimmy Ring | Second | 5½ out |
| Wednesday, September 20 |
| » Defeated Giants (86-56), 4-1 | Polo Grounds V (5-4) | 83-62 | Won 2 |
| » Starters: Wilbur Cooper vs Hugh McQuillan | Second | 4½ out |
| Future Pirate Vic Lombardi is born in Reedley, CA. |
| Thursday, September 21 |
| » Defeated Giants (86-57), 6-1 | Polo Grounds V (6-4) | 84-62 | Won 3 |
| » Starters: Earl Hamilton vs Art Nehf | Second | 3½ out |
| Friday, September 22 |
| » Lost to Giants (87-57), 8-7 | Polo Grounds V (6-5) | 84-63 | |
| » Starters: Johnny Morrison vs Jesse Barnes | Second | 4½ out |
| » Major-league debuts: Freddie Maguire (Giants) |
| Saturday, September 23 |
| » Lost to Dodgers (72-75), 9-5 | Ebbets Field (2-6) | 84-64 | Lost 2 |
| » Starters: Whitey Glazner vs Dutch Ruether | Second | 6 out |
| » Lost to Dodgers (73-75), 5-1 | Ebbets Field (2-7) | 84-65 | Lost 3 |
| » Starters: Wilbur Cooper vs Art Decatur | Second | 6 out |
| Sunday, September 24 |
| » Lost to Dodgers (74-75), 4-2 | Ebbets Field (2-8) | 84-66 | Lost 4 |
| » Starters: Johnny Morrison vs Burleigh Grimes | Second | 5½ out |
| » Defeated Dodgers (74-76), 11-3 | Ebbets Field (3-8) | 85-66 | |
| » Starters: Babe Adams vs Leon Cadore | Second | 5½ out |
| Wednesday, September 27 |
| » Lost to Cubs (79-71), 4-1 | Forbes Field (45-33) | 85-67 | |
| » Starters: Fred Fussell vs Wilbur Cooper | Second | 7 out |
| Saturday, September 30 |
| » Tied Reds, 7-7 | Crosley Field (5-4) | 85-67 | |
| » Starters: Johnny Morrison vs Pete Donohue | Second | 7 out |
| Sunday, October 1 |
| » Lost to Reds (85-68), 5-4 | Crosley Field (5-5) | 85-68 | Lost 2 |
| » Starters: Wilbur Cooper vs Dolf Luque | Third | 8 out |
| » Lost to Reds (86-68), 5-1 | Crosley Field (5-6) | 85-69 | Lost 3 |
| » Starters: Whitey Glazner vs Eppa Rixey | Third | 8 out |
| Friday, October 27 |
| Future Pirate Ralph Kiner is born in Santa Rita, NM. |
| Tuesday, October 31 |
| Former Pirate Dick Padden dies in Martins Ferry, OH at the age of 53. |
| Saturday, November 4 |
| Future Pirate Eddie Basinski is born in Buffalo, NY. |
| Sunday, November 26 |
| Future Pirate Ben Wade is born in Morehead City, NC. |
Game information provided by Retrosheet (www.retrosheet.org) |
