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.
Frank Morrissey
| Given name: | Michael Joseph Morrissey |
| Nicknames: | Deacon |
| Primary Pos: | Pitcher |
| Hght/Wght: | 5'4" / 140 lbs |
| Bats/Throws: | None / R |
| Born: | May 3, 1876 in Baltimore, MD |
| Died: | Feb 22, 1939 in Baltimore, MD (62 years old) |
| Debut: | Jul 13, 1901 |