| Mike Slattery | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | November 26, 1866 |
| Birth Place: | Boston, Massachusetts, U.S. |
| Death Place: | Boston, Massachusetts, U.S. |
| Debutleague: | MLB |
| Debutdate: | April 17 |
| Debutyear: | 1884 |
| Debutteam: | Boston Reds |
| Finalleague: | MLB |
| Finaldate: | July 23 |
| Finalyear: | 1891 |
| Finalteam: | Washington Statesmen |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .251 |
| Stat2label: | Home runs |
| Stat2value: | 8 |
| Stat3label: | Runs batted in |
| Stat3value: | 135 |
| Teams: |
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Michael J. Slattery (November 26, 1866 – October 16, 1904) was an American professional baseball player. He played five seasons in Major League Baseball between 1884 and 1891 for the Boston Reds, New York Giants (NL), New York Giants (PL), Cincinnati Reds, and Washington Statesmen, primarily as an outfielder.