| Fleury Sullivan | |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 1862 |
| Birth Place: | East St. Louis, Illinois |
| Death Place: | East St. Louis, Illinois |
| Debutleague: | MLB |
| Debutdate: | May 3 |
| Debutyear: | 1884 |
| Debutteam: | Pittsburgh Alleghenys |
| Finalleague: | MLB |
| Finaldate: | October 15 |
| Finalyear: | 1884 |
| Finalteam: | Pittsburgh Alleghenys |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 16–35 |
| Stat2label: | Strikeouts |
| Stat2value: | 189 |
| Stat3label: | Earned Run Average |
| Stat3value: | 4.20 |
| Teams: |
|
Florence P. Sullivan (1862 – February 8, 1897), was an American professional baseball player who played pitcher in Major League Baseball for the Pittsburgh Alleghenys in . Sullivan has the record for most strikeouts in a career that lasted only one season, with 189.