| Mike Heydon | |
| Position: | Catcher |
| Birth Date: | 15 July 1874 |
| Birth Place: | Missouri |
| Death Place: | Indianapolis, Indiana |
| Bats: | Left |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | October 12 |
| Debutyear: | 1898 |
| Debutteam: | Baltimore Orioles |
| Finalleague: | MLB |
| Finaldate: | August 16 |
| Finalyear: | 1907 |
| Finalteam: | Washington Senators |
| Statleague: | MLB |
| Stat1label: | At bats |
| Stat1value: | 619 |
| Stat2label: | RBI |
| Stat2value: | 53 |
| Stat3label: | Home runs |
| Stat3value: | 2 |
| Stat4label: | Batting average |
| Stat4value: | .179 |
| Teams: |
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Michael Edward Heydon (July 15, 1874 in Missouri – October 13, 1913 in Indianapolis, Indiana), was a professional baseball player who played catcher in the Major Leagues in -. He played for the Chicago White Sox, Washington Senators (NL), Washington Senators (AL), Baltimore Orioles, and St. Louis Cardinals.