| Mark Dempsey | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 17 December 1957 |
| Birth Place: | Dayton, Ohio |
| Debutleague: | MLB |
| Debutdate: | September 4 |
| Debutteam: | San Francisco Giants |
| Finalleague: | MLB |
| Finaldate: | October 2 |
| Finalteam: | San Francisco Giants |
| Statleague: | MLB |
| Stat1label: | Games pitched |
| Stat1value: | 3 |
| Stat2label: | ERA |
| Stat2value: | 7.94 |
| Stat3label: | Strikeouts |
| Stat3value: | 4 |
| Teams: | |
Mark Steven Dempsey (born December 17, 1957) is a former Major League Baseball pitcher who played for the San Francisco Giants in .
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