| John Gillespie | |
| Birth Date: | 25 February 1900 |
| Birth Place: | Oakland, California |
| Death Place: | Vallejo, California |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | April 12 |
| Debutyear: | 1922 |
| Debutteam: | Cincinnati Reds |
| Finaldate: | September 30 |
| Finalyear: | 1922 |
| Finalteam: | Cincinnati Reds |
| Statleague: | MLB |
| Stat1label: | Games pitched |
| Stat2label: | Win–loss record |
| Stat2value: | 3-3 |
| Stat3label: | ERA |
| Stat3value: | 4.52 |
| Stat4label: | SO / BB |
| Stat4value: | 21 / 29 |
| Stat5label: | Innings pitched |
| Stat5value: | 77⅔ |
John Patrick Gillespie (February 25, 1900 – February 15, 1954) was a pitcher in Major League Baseball who played for the Cincinnati Reds in its 1922 season. Listed at 5' 11", 172 lb., he batted and threw right handed.
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