Williams was named to the All-Big Ten team as a junior, when Ohio State finished the year with a 21–8 record and advanced to the NCAA regionals.

He remains among the Pacers' top ten career leaders in rebounds (4,494), blocks (1,094), and games played (577).

Williams was traded to the Dallas Mavericks midway through the 1988–1989 season on February 22 in exchange for forward Detlef Schrempf.

[2] In 1992, he was signed by the New York Knicks, where he spent seven years backing up perennial All-Star Patrick Ewing.

Williams played one game (31 minutes) for the Toronto Raptors in 1996 before being waived and quickly returned to the Knicks.