| Tuesday, January 7 |
| Future Pirate Al Todd is born in Troy, NY. |
| Friday, March 7 |
| Former Pirate Pud Galvin dies in Pittsburgh, PA at the age of 46. |
| Thursday, April 17 |
| » Defeated Cardinals (0-1), 1-0 | Robison Field (1-0) | 1-0 | |
| » Starters: Deacon Phillippe vs Stan Yerkes | First | -- |
| » Major-league debuts: Homer Smoot (Cardinals) |
| Friday, April 18 |
| » Major-league debuts: Red Dooin (Phillies) |
| Saturday, April 19 |
| » Defeated Cardinals (0-2), 10-4 | Robison Field (2-0) | 2-0 | Won 2 |
| » Starters: Jack Chesbro vs Bill Popp | Second | ½ out |
| Sunday, April 20 |
| » Defeated Cardinals (0-3), 10-2 | Robison Field (3-0) | 3-0 | Won 3 |
| » Starters: Jesse Tannehill vs Bob Wicker | First | -- |
| Monday, April 21 |
| » Major-league debuts: Jack O'Neill (Cardinals) |
| Tuesday, April 22 |
| » Defeated Reds (1-4), 4-3 | Exposition Park III (1-0) | 4-0 | Won 4 |
| » Starters: Archie Stimmel vs Sam Leever | First | -- |
| Wednesday, April 23 |
| » Defeated Reds (1-5), 11-3 | Exposition Park III (2-0) | 5-0 | Won 5 |
| » Starters: Bob Ewing vs Deacon Phillippe | First | -- |
| Thursday, April 24 |
| » Lost to Cubs (5-1), 5-3 | Exposition Park III (2-1) | 5-1 | |
| » Starters: Pop Williams vs Jack Chesbro | First | -- |
| » Major-league debuts: Mike Lynch (Cubs) |
| Friday, April 25 |
| » Lost to Cubs (6-1), 4-2 | Exposition Park III (2-2) | 5-2 | Lost 2 |
| » Starters: Mal Eason vs Jesse Tannehill | Second | 1 out |
| Saturday, April 26 |
| » Defeated Cubs (6-2), 7-0 | Exposition Park III (3-2) | 6-2 | |
| » Starters: Bob Rhoads vs Sam Leever | First | -- |
| Sunday, April 27 |
| » Defeated Cubs (6-3), 2-0 | West Side Grounds (1-0) | 7-2 | Won 2 |
| » Starters: Deacon Phillippe vs Jim St. Vrain | First | -- |
| Monday, April 28 |
| Future Pirate Red Lucas is born in Columbia, TN. |
| Wednesday, April 30 |
| » Defeated Cardinals (2-7), 7-4 | Exposition Park III (4-2) | 8-2 | Won 3 |
| » Starters: Stan Yerkes vs Jack Chesbro | First | -- |
| Thursday, May 1 |
| » Defeated Cardinals (2-8), 18-6 | Exposition Park III (5-2) | 9-2 | Won 4 |
| » Starters: Bill Popp vs Jesse Tannehill | First | -- |
| Friday, May 2 |
| » Defeated Cardinals (2-9), 4-1 | Exposition Park III (6-2) | 10-2 | Won 5 |
| » Starters: Bob Wicker vs Sam Leever | First | -- |
| Saturday, May 3 |
| » Defeated Cardinals (2-10), 9-5 | Exposition Park III (7-2) | 11-2 | Won 6 |
| » Starters: Stan Yerkes vs Deacon Phillippe | First | -- |
| Sunday, May 4 |
| » Defeated Reds (4-9), 11-2 | Palace of the Fans (1-0) | 12-2 | Won 7 |
| » Starters: Jesse Tannehill vs Noodles Hahn | First | -- |
| Monday, May 5 |
| » Defeated Reds (4-10), 6-2 | Palace of the Fans (2-0) | 13-2 | Won 8 |
| » Starters: Sam Leever vs Bob Ewing | First | -- |
| Tuesday, May 6 |
| » Defeated Reds (4-11), 6-2 | Palace of the Fans (3-0) | 14-2 | Won 9 |
| » Starters: Jack Chesbro vs Bill Phillips | First | -- |
| Wednesday, May 7 |
| » Defeated Dodgers (6-10), 4-3 | Exposition Park III (8-2) | 15-2 | Won 10 |
| » Starters: Doc Newton vs Ed Doheny | First | -- |
| Thursday, May 8 |
| » Lost to Dodgers (7-10), 4-1 | Exposition Park III (8-3) | 15-3 | |
| » Starters: Frank Kitson vs Deacon Phillippe | First | -- |
| Friday, May 9 |
| » Defeated Dodgers (7-11), 12-1 | Exposition Park III (9-3) | 16-3 | |
| » Starters: Bill Donovan vs Jesse Tannehill | First | -- |
| Saturday, May 10 |
| » Defeated Dodgers (7-12), 8-4 | Exposition Park III (10-3) | 17-3 | Won 2 |
| » Starters: Jim Hughes vs Jack Chesbro | First | -- |
| Sunday, May 11 |
| » Defeated Reds (6-14), 10-0 | Palace of the Fans (4-0) | 18-3 | Won 3 |
| » Starters: Ed Doheny vs Clarence Currie | First | -- |
| Monday, May 12 |
| » Defeated Braves (9-10), 4-2 | Exposition Park III (11-3) | 19-3 | Won 4 |
| » Starters: Vic Willis vs Sam Leever | First | -- |
| Wednesday, May 14 |
| » Lost to Braves (10-10), 10-5 | Exposition Park III (11-4) | 19-4 | |
| » Starters: Togie Pittinger vs Jack Chesbro | First | -- |
| Thursday, May 15 |
| » Defeated Braves (10-11), 5-1 | Exposition Park III (12-4) | 20-4 | |
| » Starters: John Malarkey vs Ed Doheny | First | -- |
| Friday, May 16 |
| » Defeated Phillies (10-13), 6-1 | Exposition Park III (13-4) | 21-4 | Won 2 |
| » Starters: Doc White vs Jack Chesbro | First | -- |
| Saturday, May 17 |
| » Defeated Phillies (10-14), 9-3 | Exposition Park III (14-4) | 22-4 | Won 3 |
| » Starters: Bill Duggleby vs Jesse Tannehill | First | -- |
| Sunday, May 18 |
| » Defeated Cubs (14-9), 11-3 | West Side Grounds (2-0) | 23-4 | Won 4 |
| » Starters: Deacon Phillippe vs Jock Menefee | First | -- |
| Monday, May 19 |
| » Defeated Phillies (10-15), 2-1 | Exposition Park III (15-4) | 24-4 | Won 5 |
| » Starters: Bill Magee vs Ed Doheny | First | -- |
| Tuesday, May 20 |
| » Defeated Phillies (10-16), 6-5 | Exposition Park III (16-4) | 25-4 | Won 6 |
| » Starters: Doc White vs Sam Leever | First | -- |
| Wednesday, May 21 |
| » Lost to Giants (15-12), 4-3 | Exposition Park III (16-5) | 25-5 | |
| » Starters: Dummy Taylor vs Jesse Tannehill | First | -- |
| Thursday, May 22 |
| » Defeated Giants (15-13), 6-0 | Exposition Park III (17-5) | 26-5 | |
| » Starters: Roy Evans vs Deacon Phillippe | First | -- |
| Friday, May 23 |
| » Defeated Giants (15-14), 2-1 | Exposition Park III (18-5) | 27-5 | Won 2 |
| » Starters: Tully Sparks vs Ed Doheny | First | -- |
| Saturday, May 24 |
| » Defeated Giants (15-15), 6-1 | Exposition Park III (19-5) | 28-5 | Won 3 |
| » Starters: Roy Evans vs Jack Chesbro | First | -- |
| Tuesday, May 27 |
| » Major-league debuts: Fred Glade (Cubs) |
| Wednesday, May 28 |
| » Defeated Reds (12-20), 4-3 | Exposition Park III (20-5) | 29-5 | Won 4 |
| » Starters: Henry Thielman vs Jesse Tannehill | First | -- |
| Friday, May 30 |
| » Defeated Cubs (22-12), 8-6 | Exposition Park III (21-5) | 30-5 | Won 5 |
| » Starters: Jim St. Vrain vs Ed Doheny | First | -- |
| » Lost to Cubs (23-12), 4-0 | Exposition Park III (21-6) | 30-6 | |
| » Starters: Jock Menefee vs Deacon Phillippe | First | -- |
| Tuesday, June 3 |
| » Lost to Phillies (16-20), 4-3 | Baker Bowl (0-1) | 30-7 | Lost 2 |
| » Starters: Deacon Phillippe vs Doc White | First | -- |
| Wednesday, June 4 |
| » Defeated Phillies (16-21), 7-4 | Baker Bowl (1-1) | 31-7 | |
| » Starters: Jesse Tannehill vs Bill Magee | First | -- |
| Thursday, June 5 |
| » Defeated Phillies (16-22), 9-4 | Baker Bowl (2-1) | 32-7 | Won 2 |
| » Starters: Jack Chesbro vs Chick Fraser | First | -- |
| Friday, June 6 |
| » Tied Giants, 4-4 | Polo Grounds IV (0-0) | 32-7 | |
| » Starters: Ed Doheny vs Christy Mathewson | First | -- |
| Future Pirate Fresco Thompson is born in Centreville, AL. |
| Saturday, June 7 |
| » Defeated Giants (17-24), 6-0 | Polo Grounds IV (1-0) | 33-7 | Won 3 |
| » Starters: Deacon Phillippe vs Roy Evans | First | -- |
| Monday, June 9 |
| » Lost to Giants (18-24), 5-3 | Polo Grounds IV (1-1) | 33-8 | |
| » Starters: Jesse Tannehill vs Tully Sparks | First | -- |
| Tuesday, June 10 |
| » Lost to Dodgers (24-20), 5-4 | Washington Park III (0-1) | 33-9 | Lost 2 |
| » Starters: Ed Doheny vs Jim Hughes | First | -- |
| Thursday, June 12 |
| » Defeated Dodgers (24-21), 5-0 | Washington Park III (1-1) | 34-9 | |
| » Starters: Jack Chesbro vs Doc Newton | First | -- |
| Saturday, June 14 |
| » Lost to Braves (20-22), 3-0 | South End Grounds III (0-1) | 34-10 | |
| » Starters: Deacon Phillippe vs Togie Pittinger | First | -- |
| Monday, June 16 |
| » Braves forfeited to Pirates. | South End Grounds III (1-1) | 35-10 | |
| Thursday, June 19 |
| » Lost to Cardinals (20-28), 3-2 | Exposition Park III (21-7) | 35-11 | |
| » Starters: Mike O'Neill vs Jesse Tannehill | First | -- |
| Saturday, June 21 |
| » Defeated Cardinals (20-29), 4-3 | Exposition Park III (22-7) | 36-11 | |
| » Starters: Ed Murphy vs Sam Leever | First | -- |
| » Defeated Cardinals (20-30), 14-4 | Exposition Park III (23-7) | 37-11 | Won 2 |
| » Starters: Stan Yerkes vs Jack Chesbro | First | -- |
| Sunday, June 22 |
| » Lost to Cubs (30-21), 3-2 | West Side Grounds (2-1) | 37-12 | |
| » Starters: Deacon Phillippe vs Jack Taylor | First | -- |
| Monday, June 23 |
| » Defeated Cubs (30-22), 7-2 | West Side Grounds (3-1) | 38-12 | |
| » Starters: Ed Doheny vs Pop Williams | First | -- |
| Tuesday, June 24 |
| » Defeated Cubs (30-23), 7-3 | West Side Grounds (4-1) | 39-12 | Won 2 |
| » Starters: Jesse Tannehill vs Carl Lundgren | First | -- |
| Thursday, June 26 |
| » Defeated Cubs (30-24), 8-1 | West Side Grounds (5-1) | 40-12 | Won 3 |
| » Starters: Jack Chesbro vs Jock Menefee | First | -- |
| Sunday, June 29 |
| » Defeated Reds (22-32), 6-0 | Palace of the Fans (5-0) | 41-12 | Won 4 |
| » Starters: Sam Leever vs Henry Thielman | First | -- |
| Monday, June 30 |
| Future Pirate Hal Smith is born in Creston, IA. |
| Tuesday, July 1 |
| » Defeated Reds (22-33), 4-3 | Exposition Park III (24-7) | 42-12 | Won 5 |
| » Starters: Bill Phillips vs Deacon Phillippe | First | -- |
| Wednesday, July 2 |
| » Defeated Reds (22-34), 3-1 | Exposition Park III (25-7) | 43-12 | Won 6 |
| » Starters: Noodles Hahn vs Ed Doheny | First | -- |
| Friday, July 4 |
| » Defeated Dodgers (36-28), 3-0 | Exposition Park III (26-7) | 44-12 | Won 7 |
| » Starters: Doc Newton vs Jesse Tannehill | First | -- |
| » Defeated Dodgers (36-29), 4-0 | Exposition Park III (27-7) | 45-12 | Won 8 |
| » Starters: Frank Kitson vs Jack Chesbro | First | -- |
| Saturday, July 5 |
| » Lost to Dodgers (37-29), 2-0 | Exposition Park III (27-8) | 45-13 | |
| » Starters: Bill Donovan vs Sam Leever | First | -- |
| Sunday, July 6 |
| » Lost to Cubs (35-30), 8-3 | West Side Grounds (5-2) | 45-14 | Lost 2 |
| » Starters: Deacon Phillippe vs Jack Taylor | First | -- |
| Monday, July 7 |
| » Defeated Phillies (29-37), 5-3 | Exposition Park III (28-8) | 46-14 | |
| » Starters: Ham Iburg vs Jesse Tannehill | First | -- |
| Tuesday, July 8 |
| » Defeated Phillies (29-38), 5-0 | Exposition Park III (29-8) | 47-14 | Won 2 |
| » Starters: Chick Fraser vs Jack Chesbro | First | -- |
| Wednesday, July 9 |
| » Defeated Phillies (29-39), 8-2 | Exposition Park III (30-8) | 48-14 | Won 3 |
| » Starters: Doc White vs Ed Doheny | First | -- |
| Thursday, July 10 |
| » Lost to Giants (22-45), 3-1 | Exposition Park III (30-9) | 48-15 | |
| » Starters: Roy Evans vs Sam Leever | First | -- |
| Friday, July 11 |
| » Defeated Giants (22-46), 6-3 | Exposition Park III (31-9) | 49-15 | |
| » Starters: Tully Sparks vs Deacon Phillippe | First | -- |
| Saturday, July 12 |
| » Defeated Giants (22-47), 4-0 | Exposition Park III (32-9) | 50-15 | Won 2 |
| » Starters: Christy Mathewson vs Jack Chesbro | First | -- |
| Sunday, July 13 |
| » Defeated Reds (27-40), 3-1 | Palace of the Fans (6-0) | 51-15 | Won 3 |
| » Starters: Jesse Tannehill vs Noodles Hahn | First | -- |
| Monday, July 14 |
| » Defeated Braves (37-28), 4-1 | Exposition Park III (33-9) | 52-15 | Won 4 |
| » Starters: Vic Willis vs Ed Doheny | First | -- |
| Tuesday, July 15 |
| » Defeated Braves (37-29), 5-0 | Exposition Park III (34-9) | 53-15 | Won 5 |
| » Starters: Mal Eason vs Deacon Phillippe | First | -- |
| Wednesday, July 16 |
| » Defeated Braves (37-30), 9-1 | Exposition Park III (35-9) | 54-15 | Won 6 |
| » Starters: Togie Pittinger vs Jack Chesbro | First | -- |
| Thursday, July 17 |
| » Defeated Braves (37-31), 8-2 | Exposition Park III (36-9) | 55-15 | Won 7 |
| » Starters: Dad Hale vs Sam Leever | First | -- |
| Friday, July 18 |
| » Lost to Cubs (42-34), 2-0 | Exposition Park III (36-10) | 55-16 | |
| » Starters: Jack Taylor vs Ed Doheny | First | -- |
| Saturday, July 19 |
| » Defeated Cubs (42-35), 5-0 | Exposition Park III (37-10) | 56-16 | |
| » Starters: Bob Rhoads vs Jack Chesbro | First | -- |
| Sunday, July 20 |
| » Defeated Cubs (42-36), 8-6 | West Side Grounds (6-2) | 57-16 | Won 2 |
| » Starters: Jesse Tannehill vs Pop Williams | First | -- |
| Tuesday, July 22 |
| » Defeated Cardinals (33-44), 9-3 | Robison Field (4-0) | 58-16 | Won 3 |
| » Starters: Deacon Phillippe vs Clarence Currie | First | -- |
| Wednesday, July 23 |
| » Lost to Cardinals (34-44), 10-4 | Robison Field (4-1) | 58-17 | |
| » Starters: Sam Leever vs Stan Yerkes | First | -- |
| Thursday, July 24 |
| » Lost to Cardinals (35-44), 5-4 | Robison Field (4-2) | 58-18 | Lost 2 |
| » Starters: Jack Chesbro vs Mike O'Neill | First | -- |
| Saturday, July 26 |
| » Defeated Cardinals (35-45), 5-1 | Robison Field (5-2) | 59-18 | |
| » Starters: Sam Leever vs Stan Yerkes | First | -- |
| Sunday, July 27 |
| » Lost to Cardinals (36-45), 7-6 | Robison Field (5-3) | 59-19 | |
| » Starters: Ed Doheny vs Mike O'Neill | First | -- |
| Tuesday, July 29 |
| » Defeated Dodgers (48-39), 14-1 | Washington Park III (2-1) | 60-19 | |
| » Starters: Deacon Phillippe vs Jim Hughes | First | -- |
| Wednesday, July 30 |
| » Lost to Dodgers (49-39), 5-1 | Washington Park III (2-2) | 60-20 | |
| » Starters: Jesse Tannehill vs Frank Kitson | First | -- |
| Thursday, July 31 |
| » Defeated Dodgers (49-40), 3-0 | Washington Park III (3-2) | 61-20 | |
| » Starters: Jack Chesbro vs Roy Evans | First | -- |
| Friday, August 1 |
| » Tied Dodgers, 6-6 | Washington Park III (3-2) | 61-20 | |
| » Starters: Sam Leever vs Bill Donovan | First | -- |
| Saturday, August 2 |
| » Defeated Giants (28-59), 7-2 | Polo Grounds IV (2-1) | 62-20 | Won 2 |
| » Starters: Ed Doheny vs Dummy Taylor | First | -- |
| Monday, August 4 |
| » Defeated Giants (28-60), 9-7 | Polo Grounds IV (3-1) | 63-20 | Won 3 |
| » Starters: Deacon Phillippe vs Joe McGinnity | First | -- |
| Future Pirate Homer Blankenship is born in Bonham, TX. |
| Tuesday, August 5 |
| » Defeated Giants (28-61), 3-0 | Polo Grounds IV (4-1) | 64-20 | Won 4 |
| » Starters: Jesse Tannehill vs Christy Mathewson | First | -- |
| Wednesday, August 6 |
| » Defeated Giants (28-62), 2-0 | Polo Grounds IV (5-1) | 65-20 | Won 5 |
| » Starters: Jack Chesbro vs Dummy Taylor | First | -- |
| Thursday, August 7 |
| » Lost to Phillies (37-54), 3-2 | Baker Bowl (2-2) | 65-21 | |
| » Starters: Sam Leever vs Bill Duggleby | First | -- |
| Friday, August 8 |
| » Defeated Phillies (37-55), 6-4 | Baker Bowl (3-2) | 66-21 | |
| » Starters: Deacon Phillippe vs Ham Iburg | First | -- |
| Saturday, August 9 |
| » Defeated Phillies (37-56), 1-0 | Baker Bowl (4-2) | 67-21 | Won 2 |
| » Starters: Jack Chesbro vs Doc White | First | -- |
| Tuesday, August 12 |
| » Lost to Braves (47-41), 11-0 | South End Grounds III (1-2) | 67-22 | |
| » Starters: Ed Doheny vs Togie Pittinger | First | -- |
| Wednesday, August 13 |
| » Lost to Braves (48-41), 8-6 | South End Grounds III (1-3) | 67-23 | Lost 2 |
| » Starters: Jack Chesbro vs Vic Willis | First | -- |
| » Defeated Braves (48-42), 6-1 | South End Grounds III (2-3) | 68-23 | |
| » Starters: Deacon Phillippe vs Bob Dresser | First | -- |
| Thursday, August 14 |
| » Defeated Braves (48-43), 6-1 | South End Grounds III (3-3) | 69-23 | Won 2 |
| » Starters: Jesse Tannehill vs Mal Eason | First | -- |
| Saturday, August 16 |
| » Defeated Phillies (38-59), 4-2 | Exposition Park III (38-10) | 70-23 | Won 3 |
| » Starters: Chick Fraser vs Jack Chesbro | First | -- |
| » Defeated Phillies (38-60), 6-2 | Exposition Park III (39-10) | 71-23 | Won 4 |
| » Starters: Ham Iburg vs Sam Leever | First | -- |
| Sunday, August 17 |
| » Lost to Reds (45-51), 2-1 | Palace of the Fans (6-1) | 71-24 | |
| » Starters: Deacon Phillippe vs Ed Poole | First | -- |
| Monday, August 18 |
| » Defeated Phillies (38-61), 7-4 | Exposition Park III (40-10) | 72-24 | |
| » Starters: Doc White vs Ed Doheny | First | -- |
| Tuesday, August 19 |
| » Defeated Giants (35-67), 5-4 | Exposition Park III (41-10) | 73-24 | Won 2 |
| » Starters: Roscoe Miller vs Jack Chesbro | First | -- |
| Thursday, August 21 |
| » Defeated Giants (35-68), 2-0 | Exposition Park III (42-10) | 74-24 | Won 3 |
| » Starters: Christy Mathewson vs Sam Leever | First | -- |
| » Lost to Giants (36-68), 8-1 | Exposition Park III (42-11) | 74-25 | |
| » Starters: Joe McGinnity vs Deacon Phillippe | First | -- |
| Friday, August 22 |
| » Defeated Dodgers (58-48), 14-2 | Exposition Park III (43-11) | 75-25 | |
| » Starters: Frank Kitson vs Ed Doheny | First | -- |
| » Defeated Dodgers (58-49), 7-1 | Exposition Park III (44-11) | 76-25 | Won 2 |
| » Starters: Roy Evans vs Jack Chesbro | First | -- |
| Saturday, August 23 |
| » Lost to Dodgers (59-49), 9-8 | Exposition Park III (44-12) | 76-26 | |
| » Starters: Jim Hughes vs Sam Leever | First | -- |
| » Major-league debuts: Bill Miller (Pirates) |
| Sunday, August 24 |
| » Defeated Reds (49-55), 8-6 | Palace of the Fans (7-1) | 77-26 | |
| » Starters: Deacon Phillippe vs Bill Phillips | First | -- |
| » Lost to Reds (50-55), 9-4 | Palace of the Fans (7-2) | 77-27 | |
| » Starters: Harvey Cushman vs Ed Poole | First | -- |
| Monday, August 25 |
| » Defeated Dodgers (60-51), 8-6 | Exposition Park III (45-12) | 78-27 | |
| » Starters: Jim Hughes vs Jesse Tannehill | First | -- |
| Tuesday, August 26 |
| » Defeated Braves (53-49), 8-1 | Exposition Park III (46-12) | 79-27 | Won 2 |
| » Starters: Togie Pittinger vs Jack Chesbro | First | -- |
| » Defeated Braves (53-50), 3-0 | Exposition Park III (47-12) | 80-27 | Won 3 |
| » Starters: Vic Willis vs Ed Doheny | First | -- |
| Wednesday, August 27 |
| » Defeated Braves (53-51), 7-2 | Exposition Park III (48-12) | 81-27 | Won 4 |
| » Starters: Mal Eason vs Sam Leever | First | -- |
| Thursday, August 28 |
| » Defeated Cubs (56-54), 11-3 | Exposition Park III (49-12) | 82-27 | Won 5 |
| » Starters: Jack Taylor vs Deacon Phillippe | First | -- |
| Future Pirate Wally Roettger is born in St. Louis, MO. |
| Friday, August 29 |
| » Lost to Cubs (57-54), 9-3 | Exposition Park III (49-13) | 82-28 | |
| » Starters: Pop Williams vs Harvey Cushman | First | -- |
| » Major-league debuts: Lee Fohl (Pirates) |
| Saturday, August 30 |
| » Defeated Cubs (57-55), 3-2 | Exposition Park III (50-13) | 83-28 | |
| » Starters: Carl Lundgren vs Jesse Tannehill | First | -- |
| Monday, September 1 |
| » Defeated Dodgers (60-54), 4-3 | Washington Park III (4-2) | 84-28 | Won 2 |
| » Starters: Jack Chesbro vs Bill Donovan | First | -- |
| » Defeated Dodgers (60-55), 8-7 | Washington Park III (5-2) | 85-28 | Won 3 |
| » Starters: Sam Leever vs Frank Kitson | First | -- |
| Tuesday, September 2 |
| » Defeated Dodgers (60-56), 5-3 | Washington Park III (6-2) | 86-28 | Won 4 |
| » Starters: Deacon Phillippe vs Jim Hughes | First | -- |
| » Lost to Dodgers (61-56), 3-0 | Washington Park III (6-3) | 86-29 | |
| » Starters: Harvey Cushman vs Doc Newton | First | -- |
| Wednesday, September 3 |
| » Defeated Braves (57-54), 12-5 | South End Grounds III (4-3) | 87-29 | |
| » Starters: Ed Doheny vs Mal Eason | First | -- |
| » Major-league debuts: Ed Phelps (Pirates) |
| Thursday, September 4 |
| » Lost to Braves (58-54), 1-0 | South End Grounds III (4-4) | 87-30 | |
| » Starters: Jack Chesbro vs Togie Pittinger | First | -- |
| » Tied Braves, 0-0 | South End Grounds III (4-4) | 87-30 | |
| » Starters: Sam Leever vs John Malarkey | First | -- |
| Friday, September 5 |
| » Defeated Braves (58-55), 6-3 | South End Grounds III (5-4) | 88-30 | |
| » Starters: Deacon Phillippe vs Vic Willis | First | -- |
| » Lost to Braves (59-55), 12-1 | South End Grounds III (5-5) | 88-31 | |
| » Starters: Harvey Cushman vs Fred Klobedanz | First | -- |
| Saturday, September 6 |
| » Defeated Giants (40-77), 9-3 | Polo Grounds IV (6-1) | 89-31 | |
| » Starters: Ed Doheny vs Christy Mathewson | First | -- |
| » Major-league debuts: Jack Robinson (Giants) |
| Monday, September 8 |
| » Lost to Giants (41-77), 3-1 | Polo Grounds IV (6-2) | 89-32 | |
| » Starters: Jack Chesbro vs Joe McGinnity | First | -- |
| » Lost to Giants (42-77), 7-4 | Polo Grounds IV (6-3) | 89-33 | Lost 2 |
| » Starters: Sam Leever vs Jack Cronin | First | -- |
| » Major-league debuts: Jimmy Sebring (Pirates) |
| Wednesday, September 10 |
| » Defeated Phillies (49-71), 5-1 | Baker Bowl (5-2) | 90-33 | |
| » Starters: Jesse Tannehill vs Bill Wolfe | First | -- |
| Thursday, September 11 |
| » Defeated Phillies (49-72), 7-5 | Baker Bowl (6-2) | 91-33 | Won 2 |
| » Starters: Jack Chesbro vs Doc White | First | -- |
| » Defeated Phillies (49-73), 8-2 | Baker Bowl (7-2) | 92-33 | Won 3 |
| » Starters: Warren McLaughlin vs Chick Fraser | First | -- |
| Friday, September 12 |
| » Defeated Phillies (49-74), 5-2 | Baker Bowl (8-2) | 93-33 | Won 4 |
| » Starters: Sam Leever vs Bill Duggleby | First | -- |
| Saturday, September 13 |
| » Lost to Reds (62-63), 6-4 | Exposition Park III (50-14) | 93-34 | |
| » Starters: Ed Poole vs Jesse Tannehill | First | -- |
| Sunday, September 14 |
| » Defeated Cardinals (55-67), 9-6 | Robison Field (6-3) | 94-34 | |
| » Starters: Warren McLaughlin vs Mike O'Neill | First | -- |
| » Major-league debuts: Jim Hackett and Art Weaver (Cardinals) |
| Monday, September 15 |
| » Defeated Cardinals (55-68), 6-1 | Robison Field (7-3) | 95-34 | Won 2 |
| » Starters: Sam Leever vs Bob Wicker | First | -- |
| » Major-league debuts: Chappie McFarland (Cardinals) |
| Wednesday, September 17 |
| » Defeated Cardinals (55-69), 12-3 | Exposition Park III (51-14) | 96-34 | Won 3 |
| » Starters: Alex Pearson vs Jack Chesbro | First | -- |
| Thursday, September 18 |
| » Defeated Cardinals (55-70), 7-6 | Exposition Park III (52-14) | 97-34 | Won 4 |
| » Starters: Jim Hackett vs Jesse Tannehill | First | -- |
| Saturday, September 20 |
| » Defeated Cardinals (55-71), 7-4 | Exposition Park III (53-14) | 98-34 | Won 5 |
| » Starters: Chappie McFarland vs Warren McLaughlin | First | -- |
| Sunday, September 21 |
| » Defeated Cubs (66-68), 4-1 | West Side Grounds (7-2) | 99-34 | Won 6 |
| » Starters: Deacon Phillippe vs Carl Lundgren | First | -- |
| » Defeated Cubs (66-69), 4-1 | West Side Grounds (8-2) | 100-34 | Won 7 |
| » Starters: Sam Leever vs Frank Morrissey | First | -- |
| Saturday, September 27 |
| » Defeated Reds (68-68), 13-6 | Exposition Park III (54-14) | 101-34 | Won 8 |
| » Starters: Rube Vickers vs Jack Chesbro | First | -- |
| Sunday, September 28 |
| » Lost to Reds (69-68), 3-2 | Palace of the Fans (7-3) | 101-35 | |
| » Starters: Deacon Phillippe vs Noodles Hahn | First | -- |
| Future Pirate Leon Chagnon is born in Pittsfield, NH. |
| Thursday, October 2 |
| » Lost to Reds (70-68), 6-4 | Exposition Park III (54-15) | 101-36 | Lost 2 |
| » Starters: Bill Phillips vs Sam Leever | First | -- |
| Friday, October 3 |
| » Defeated Reds (70-69), 5-1 | Exposition Park III (55-15) | 102-36 | |
| » Starters: Rube Vickers vs Jack Chesbro | First | -- |
| Saturday, October 4 |
| » Defeated Reds (70-70), 11-2 | Exposition Park III (56-15) | 103-36 | Won 2 |
| » Starters: Jake Beckley vs Deacon Phillippe | First | -- |
| Sunday, October 5 |
| » Major-league debuts: Otto Williams (Cardinals) |
Game information provided by Retrosheet (www.retrosheet.org) |