League injury log -- National League
Regular season -- as of 9/18/1891
| Injuries |
| Date | # | Team | Player | Cause | Dur |
| 4/6/1891 |   | ONS | McGuire | Collision in field | 0 |
| 4/8/1891 |   | PA | Milligan | General | 0 |
| 4/8/1891 |   | PA | Dahlen | General | 1 |
| 4/10/1891 |   | PA | Cunningham | General | 1 |
| 4/10/1891 |   | BB | Pinkney | General | 3 |
| 4/11/1891 |   | BB | Daley | General | 3 |
| 4/11/1891 |   | CA | Reilly,C | General | 0 |
| 4/13/1891 |   | MM | McCarthy | Hit by pitch | 5 |
| 4/15/1891 |   | BB | Duffee | General | 1 |
| 4/16/1891 |   | SBB | Carney | General | 0 |
| 4/18/1891 |   | PA | Richardson,D | General | 0 |
| 4/20/1891 |   | MM | McCarthy | General | 4 |
| 4/22/1891 |   | BB | Healy | General | 9 |
| 4/22/1891 |   | ONS | McGuire | Collision in field | 0 |
| 4/24/1891 |   | ONS | Lyons | General | 7 |
| 4/25/1891 |   | BB | Crane | General | 0 |
| 4/29/1891 |   | BB | Brown,T | General | 0 |
| 5/1/1891 |   | CA | Smith,G | General | 0 |
| 5/2/1891 |   | CA | Bennett | Collision in field | 20 |
| 5/2/1891 |   | SLB | Quinn | Hit by pitch | 0 |
| 5/2/1891 |   | MB | Boyle | General | 0 |
| 5/4/1891 |   | MB | Boyle | Hit by pitch | 0 |
| 5/5/1891 |   | MM | Pfeffer | Hit by pitch | 14 |
| 5/8/1891 |   | MB | McGraw | General | 0 |
| 5/11/1891 |   | FY | Sharrott | General | 0 |
| 5/11/1891 |   | CA | Welch,C | Hit by pitch | 0 |
| 5/12/1891 |   | MM | Reilly,J | Hit by pitch | 0 |
| 5/12/1891 |   | FY | Crooks | General | 0 |
| 5/13/1891 |   | BB | Healy | General | 0 |
| 5/14/1891 |   | FY | Griffin,M | General | 2 |
| 5/14/1891 |   | BB | Brown,T | General | 0 |
| 5/14/1891 |   | BB | Cooney | General | 2 |
| 5/14/1891 |   | SBB | Vaughn | General | 0 |
| 5/15/1891 |   | BB | Miller,D | General | 0 |
| 5/19/1891 |   | CA | Lovett | General | 0 |
| 5/19/1891 |   | SLB | Esper | General | 1 |
| 5/22/1891 |   | MM | Cross | General | 6 |
| 5/23/1891 |   | PA | Glasscock | General | 3 |
| 5/23/1891 |   | MB | Gilbert | General | 1 |
| 5/26/1891 |   | MM | Gleason | Rain delay | 0 |
| 5/26/1891 |   | CA | Smith,G | General | 0 |
| 5/27/1891 |   | SBB | Donovan | General | 4 |
| 5/27/1891 |   | MB | Collins,H | General | 3 |
| 5/27/1891 |   | ONS | Delahanty | General | 3 |
| 5/27/1891 |   | PA | Tucker | Hit by pitch | 4 |
| 5/28/1891 |   | CA | Foutz | General | 7 |
| 5/28/1891 |   | PA | Dahlen | General | 0 |
| 5/29/1891 |   | ONS | McGuire | General | 12 |
| 6/1/1891 |   | CW | Larkin | Hit by pitch | 0 |
| 6/2/1891 |   | SBB | Hatfield | General | 0 |
| 6/2/1891 |   | FY | Brouthers | General | 4 |
| 6/2/1891 |   | PA | Galvin | General | 15 |
| 6/3/1891 |   | PA | Seery | General | 0 |
| 6/5/1891 |   | SLB | Clements | Collision in field | 4 |
| 6/5/1891 |   | ONS | Davis,G | General | 0 |
| 6/5/1891 |   | MB | Neale | General | 0 |
| 6/5/1891 |   | MB | Mains | General | 13 |
| 6/6/1891 |   | MM | Cross | Collision in field | 17 |
| 6/6/1891 |   | PA | Johnson,B | General | 0 |
| 6/6/1891 |   | ONS | Caruthers | Rain delay | 0 |
| 6/8/1891 |   | FY | Griffin,M | General | 4 |
| 6/8/1891 |   | SBB | Farrell | General | 7 |
| 6/8/1891 |   | SBB | Hatfield | General | 0 |
| 6/9/1891 |   | MB | Boyle | General | 0 |
| 6/9/1891 |   | SBB | Childs | General | 0 |
| 6/9/1891 |   | PA | Johnson,B | General | 7 |
| 6/10/1891 |   | MB | Burkett | General | 8 |
| 6/10/1891 |   | SBB | Nichols | Rain delay | 0 |
| 6/10/1891 |   | ONS | Werden | General | 0 |
| 6/12/1891 |   | MM | McCarthy | General | 0 |
| 6/12/1891 |   | SLB | Ward,J | General | 1 |
| 6/12/1891 |   | SBB | Hatfield | General | 1 |
| 6/12/1891 |   | FY | Gruber | Rain delay | 0 |
| 6/12/1891 |   | MB | Neale | General | 0 |
| 6/13/1891 |   | SBB | Gumbert | Rain delay | 0 |
| 6/13/1891 |   | ONS | McGuire | Hit by pitch | 14 |
| 6/15/1891 |   | SLB | Wood | General | 0 |
| 6/15/1891 |   | ONS | Schriver | General | 1 |
| 6/17/1891 |   | SBB | O'Connor | General | 0 |
| 6/18/1891 |   | SLB | Weaver | General | 0 |
| 6/18/1891 |   | SLB | Mulvey | Hit by pitch | 0 |
| 6/20/1891 |   | SBB | O'Connor | Collision in field | 0 |
| 6/20/1891 |   | FY | Viau | Rain delay | 0 |
| 6/22/1891 |   | MM | Doyle | Collision in field | 0 |
| 6/22/1891 |   | FY | Davies | Rain delay | 0 |
| 6/22/1891 |   | PA | Galvin | Rain delay | 0 |
| 6/23/1891 |   | PA | Milligan | General | 2 |
| 6/24/1891 |   | CA | Lovett | General | 0 |
| 6/25/1891 |   | BB | Anson | General | 1 |
| 6/25/1891 |   | SLB | Weaver | General | 1 |
| 6/26/1891 |   | MM | Cross | General | 3 |
| 6/26/1891 |   | BB | Ryan,Ji | General | 0 |
| 6/27/1891 |   | PA | Dahlen | General | 0 |
| 6/27/1891 |   | CA | Welch,C | Hit by pitch | 18 |
| 6/29/1891 |   | MM | Stovey | General | 13 |
| 6/30/1891 |   | MB | Neale | General | 5 |
| 7/1/1891 |   | MB | Jennings | General | 0 |
| 7/2/1891 |   | BB | Pinkney | General | 1 |
| 7/4/1891 |   | SLB | Esper | General | 0 |
| 7/4/1891 |   | BB | Cooney | General | 3 |
| 7/6/1891 |   | BB | Lowe | General | 4 |
| 7/7/1891 |   | PA | Galvin | Rain delay | 0 |
| 7/7/1891 |   | MB | Neale | Rain delay | 0 |
| 7/8/1891 |   | CW | Stricker | General | 0 |
| 7/9/1891 |   | SLB | Thompson | General | 0 |
| 7/11/1891 |   | FY | Brouthers | Hit by pitch | 20 |
| 7/11/1891 |   | SLB | Young | Rain delay | 0 |
| 7/13/1891 |   | BB | Cooney | General | 6 |
| 7/14/1891 |   | CA | McCauley | Brawl | 24 |
| 7/14/1891 |   | CA | Marr | Brawl | 44 |
| 7/14/1891 |   | CW | Bassett | General | 0 |
| 7/15/1891 |   | BB | Hallman | General | 0 |
| 7/16/1891 |   | SBB | Carney | General | 0 |
| 7/16/1891 |   | SBB | Donovan | General | 0 |
| 7/17/1891 |   | ONS | McGuire | General | 0 |
| 7/18/1891 |   | BB | Lowe | General | 5 |
| 7/20/1891 |   | MM | Doyle | General | 0 |
| 7/20/1891 |   | MM | Gleason | Rain delay | 0 |
| 7/21/1891 |   | CA | Bennett | Collision in field | 0 |
| 7/21/1891 |   | MB | Tiernan | General | 0 |
| 7/23/1891 |   | CW | Stricker | General | 0 |
| 7/23/1891 |   | CW | Staley | General | 5 |
| 7/25/1891 |   | SBB | Hoy | General | 1 |
| 7/27/1891 |   | SBB | Hatfield | General | 0 |
| 7/27/1891 |   | CA | Smith,G | General | 0 |
| 7/28/1891 |   | SBB | Carney | General | 0 |
| 7/29/1891 |   | BB | Pinkney | General | 5 |
| 7/30/1891 |   | PA | Griffith | General | 0 |
| 7/30/1891 |   | MB | Tiernan | General | 0 |
| 8/3/1891 |   | CW | Stricker | General | 0 |
| 8/4/1891 |   | SBB | Carney | General | 0 |
| 8/5/1891 |   | FY | Crooks | General | 0 |
| 8/6/1891 |   | CW | Duffy | General | 14 |
| 8/6/1891 |   | CA | Reilly,C | General | 8 |
| 8/10/1891 |   | FY | Sharrott | General | 3 |
| 8/10/1891 |   | CA | Smith,Ph | Rain delay | 0 |
| 8/11/1891 |   | CW | Brodie | General | 5 |
| 8/11/1891 |   | ONS | McGuire | General | 7 |
| 8/12/1891 |   | BB | Cooney | General | 4 |
| 8/13/1891 |   | CW | Hutchison | Rain delay | 0 |
| 8/13/1891 |   | SBB | Nichols | Rain delay | 0 |
| 8/13/1891 |   | MB | Boyle | Hit by pitch | 6 |
| 8/13/1891 |   | MM | Hines | Hit by pitch | 0 |
| 8/14/1891 |   | MM | Gleason | Rain delay | 0 |
| 8/15/1891 |   | PA | Tucker | General | 3 |
| 8/15/1891 |   | CA | Baldwin | General | 0 |
| 8/17/1891 |   | CW | Shugart | General | 5 |
| 8/17/1891 |   | SBB | O'Connor | Collision in field | 27 |
| 8/17/1891 |   | ONS | Lyons | General | 11 |
| 8/18/1891 |   | MB | Collins,H | General | 1 |
| 8/18/1891 |   | FY | Ewing,J | Rain delay | 0 |
| 8/18/1891 |   | FY | Sharrott | Rain delay | 0 |
| 8/18/1891 |   | SLB | McMahon | Rain delay | 0 |
| 8/18/1891 |   | SLB | Esper | Rain delay | 0 |
| 8/19/1891 |   | BB | Anson | General | 15 |
| 8/19/1891 |   | BB | Carroll,C | General | 0 |
| 8/20/1891 |   | SBB | Shinnick | General | 4 |
| 8/21/1891 |   | ONS | McGill | Rain delay | 0 |
| 8/24/1891 |   | BB | Rhines | General | 1 |
| 8/24/1891 |   | ONS | Hamilton | General | 0 |
| 8/24/1891 |   | CW | Holliday | General | 2 |
| 8/25/1891 |   | FY | Taylor,H | General | 5 |
| 8/26/1891 |   | BB | Healy | General | 0 |
| 8/27/1891 |   | MB | Collins,H | General | 0 |
| 8/29/1891 |   | FY | Brouthers | Collision on bases | 15 |
| 8/31/1891 |   | SBB | Gumbert | General | 15 |
| 9/1/1891 |   | CA | Smith,Ph | General | 5 |
| 9/1/1891 |   | BB | Crane | General | 0 |
| 9/1/1891 |   | CW | Hutchison | Rain delay | 0 |
| 9/1/1891 |   | SLB | Weaver | General | 0 |
| 9/2/1891 |   | FY | Cahill | General | 0 |
| 9/3/1891 |   | ONS | Lyons | General | 3 |
| 9/3/1891 |   | SLB | Weaver | General | 0 |
| 9/4/1891 |   | CA | Foutz | General | 4 |
| 9/9/1891 |   | ONS | Schriver | General | 6 |
| 9/10/1891 |   | SBB | Farrell | Collision on bases | 0 |
| 9/11/1891 |   | MB | Tiernan | General | 0 |
| 9/11/1891 |   | BB | Pinkney | General | 0 |
| 9/12/1891 |   | SBB | King | Rain delay | 0 |
| 9/12/1891 |   | ONS | O'Brien,JF | Rain delay | 0 |
| 9/12/1891 |   | ONS | Mullane | Rain delay | 0 |
| 9/12/1891 |   | BB | Healy | Rain delay | 0 |
| 9/14/1891 |   | ONS | McGuire | General | 2 |
| 9/15/1891 |   | CW | Stricker | General | 0 |
| 9/15/1891 |   | MB | O'Rourke,J | General | 0 |
| 9/18/1891 |   | ONS | Hamilton | General | 0 |
| 9/18/1891 |   | PA | Milligan | General | 3 |