William Joseph Milligan (August 19, 1878 – October 14, 1928) was an American Major League Baseball pitcher. He played for the Philadelphia Athletics during the 1901 season and the New York Giants during the 1904 season.
Billy Milligan
| Given name: | William Joseph Milligan |
| Nicknames: | None |
| Primary Pos: | Pitcher |
| Hght/Wght: | 5'7" / None lbs |
| Bats/Throws: | R / L |
| Born: | Aug 19, 1878 in Buffalo, NY |
| Died: | Oct 14, 1928 in Buffalo, NY (50 years old) |
| Debut: | Apr 30, 1901 |