William Morris Pierson (June 14, 1899 – February 20, 1959) was a Major League Baseball pitcher who played from 1918 to 1919, and again in 1924 with the Philadelphia Athletics. He batted and threw left-handed.
William Pierson
| Given name: | William Morris Pierson |
| Nicknames: | None |
| Primary Pos: | Pitcher |
| Hght/Wght: | 6'2" / 180 lbs |
| Bats/Throws: | L / L |
| Born: | Jun 14, 1899 in Atlantic City, NJ |
| Died: | Feb 20, 1959 in Atlantic City, NJ (59 years old) |
| Debut: | Jul 4, 1918 |