Players who made their Major League debut during the selected season. Player must have appeared in a game as a hitter or a pitcher.
Batting and Pitching statistics for debuts are available since 1957.
| Jesse Burkett | 1890-04-22 | boxscore | 21.144 | OF | 5-8 | 155 | L | L | 1868-12-04 | Wheeling,WV | MLB | 1890-1905 | 1890-1905 | | premium | premium | premium |
| Billy Clingman | 1890-09-09 | boxscore | 20.297 | 2B-SS | 5-11 | 150 | B | R | 1869-11-21 | Cincinnati,OH | MLB | 1890-1903 | 1890-1903 | | premium | premium | premium |
| Tommy Corcoran | 1890-04-19 | boxscore | 21.110 | SS | 5-9 | 164 | R | R | 1869-01-04 | New Haven,CT | MLB | 1890-1907 | 1890-1907 | | premium | premium | premium |
| George Davis | 1890-04-19 | boxscore | 19.244 | SS | 5-9 | 180 | B | R | 1870-08-23 | Cohoes,NY | MLB | 1890-1909 | 1890-1909 | | premium | premium | premium |
| Patsy Donovan | 1890-04-19 | boxscore | 25.040 | OF | 5-11 | 175 | L | L | 1865-03-16 | County Cork,IR | MLB | 1890-1907 | 1890-1907 | | premium | premium | premium |
| Malachi Kittridge | 1890-04-19 | boxscore | 20.194 | C | 5-7 | 170 | R | R | 1869-10-12 | Clinton,MA | MLB | 1890-1906 | 1890-1906 | | premium | premium | premium |
| Jack McFetridge | 1890-06-07 | boxscore | 20.291 | P | 6-0 | 175 | | | 1869-08-25 | Philadelphia,PA | MLB | 1890-1903 | 1890-1903 | | premium | premium | premium |
| Kid Nichols | 1890-04-23 | boxscore | 20.226 | P | 5-11 | 175 | B | R | 1869-09-14 | Madison,WI | MLB | 1890-1906 | 1890-1906 | | premium | premium | premium |
| Bill Phillips | 1890-08-11 | boxscore | 21.280 | P | 5-11 | 180 | R | R | 1868-11-09 | Allenport,PA | MLB | 1890-1903 | 1890-1903 | | premium | premium | premium |
| Cy Young | 1890-08-06 | boxscore | 23.136 | P | 6-2 | 210 | R | R | 1867-03-29 | Gilmore,OH | MLB | 1890-1911 | 1890-1911 | | premium | premium | premium |
| 10 record(s) |