| Duke Reilley | |
| Position: | Outfielder |
| Bats: | Switch |
| Throws: | Right |
| Birth Date: | 25 August 1884 |
| Birth Place: | Chicago, Illinois |
| Death Place: | Indianapolis, Indiana |
| Debutleague: | MLB |
| Debutdate: | August 28 |
| Debutyear: | 1909 |
| Debutteam: | Cleveland Naps |
| Finalleague: | MLB |
| Finaldate: | September 28 |
| Finalyear: | 1909 |
| Finalteam: | Cleveland Naps |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .210 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 0 |
| Teams: |
|
Alexander Aloysius "Duke" Reilley (August 25, 1884 – March 4, 1968), nicknamed "Midget", was a Major League Baseball left fielder who played for one season. He played for the Cleveland Naps for 20 games during the 1909 Cleveland Naps season.