William Thomas McCarthy (April 11, 1882 – May 29, 1939) was an American professional baseball pitcher. He appeared in one major-league game, pitching two innings in one game for the 1906 Boston Beaneaters. In that game, he gave up two earned runs on two hits and three walks.
William McCarthy
| Given name: | William Thomas McCarthy |
| Nicknames: | None |
| Primary Pos: | Pitcher |
| Hght/Wght: | 5'11" / 180 lbs |
| Bats/Throws: | R / R |
| Born: | Apr 11, 1882 in Ashland, MA |
| Died: | May 29, 1939 in Boston, MA (57 years old) |
| Debut: | Apr 21, 1906 |