| Date | Player | Milestones | |
| 07/31/1886 | Jasper Bonner | 100 Wins, while playing for Montreal | |
| 06/21/1887 | Walt Harkness | 500 Runs Scored, while playing for Montreal | |
| 08/26/1887 | John Bates | 100 Wins, while playing for New York | |
| 09/10/1887 | Mike Flynn | 100 Wins, while playing for New York | |
| 10/08/1887 | Walt Harkness | 1000 Hits, while playing for Montreal | |
| 04/22/1888 | Jim Weldon | 500 Runs Scored, while playing for New York | |
| 06/22/1888 | Walt Ray | 500 Runs Scored, while playing for Montreal | |
| 07/20/1888 | Fred Lorraine | 100 Wins, while playing for Brooklyn | |
| 07/22/1888 | Walt Harkness | 500 Runs Batted In, while playing for Montreal | |
| 10/09/1888 | Nate Locke | 500 Runs Scored, while playing for Cincinnati | |
| 05/04/1889 | Lew Clancy | 1000 Hits, while playing for Philadelphia | |
| 05/11/1889 | Ray Hayden | 100 Wins, while playing for Brooklyn | |
| 05/14/1889 | Walt Ray | 1000 Hits, while playing for Montreal | |
| 05/14/1889 | Walt Ray | 500 Runs Batted In, while playing for Montreal | |
| 06/07/1889 | Lew Clancy | 500 Runs Scored, while playing for Philadelphia | |
| 07/10/1889 | Vic VanAlstyne | 500 Runs Scored, while playing for Toronto | |
| 07/21/1889 | Ray Hayden | 1000 Strikeouts, while playing for Brooklyn | |
| 08/03/1889 | Jim Weldon | 1000 Hits, while playing for New York | |
| 08/09/1889 | Lew Clancy | 500 Runs Batted In, while playing for Philadelphia | |
| 04/18/1890 | Martin Bidwell | 500 Runs Scored, while playing for Cincinnati | |
| 05/22/1890 | Mike Flynn | 150 Wins, while playing for New York | |
| 06/19/1890 | George Maroney | 500 Runs Scored, while playing for Brooklyn | |
| 06/22/1890 | Vic VanAlstyne | 1000 Hits, while playing for Chicago | |
| 07/10/1890 | Mike Flynn | 1000 Strikeouts, while playing for New York | |
| 07/25/1890 | Ray Miser | 500 Runs Scored, while playing for Philadelphia | |
| 08/05/1890 | George Rooney | 500 Runs Scored, while playing for Brooklyn | |
| 09/20/1890 | David Bickford | 500 Runs Scored, while playing for Toronto | |
