| Frank Morrissey | |
| Width: | 200px |
| Position: | Pitcher |
| Birth Date: | 5 May 1876 |
| Birth Place: | Baltimore, Maryland |
| Death Place: | Baltimore, Maryland |
| Bats: | Unknown |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | July 13 |
| Debutteam: | Boston Americans |
| Finalleague: | MLB |
| Finaldate: | October 4 |
| Finalteam: | Chicago Orphans |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 1–3 |
| Stat2label: | Earned run average |
| Stat2value: | 2.23 |
| Stat3label: | Strikeouts |
| Stat3value: | 14 |
| Teams: |
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Michael Joseph Morrissey (May 5, 1876 – February 22, 1939), known as Frank and nicknamed "Deacon," was a pitcher in Major League Baseball in the early twentieth century. Morrissey appeared in a total of six games as a pitcher in 1901 and 1902, five of which were as a member of the Chicago Orphans. He compiled a 1–3 record with fourteen strikeouts in his six appearances. The Orphans also used him as a third baseman in two games in 1902.