Oliver Gordon Purnell Jr. (born May 19, 1953) is an American former college basketball coach. He served as the head men's basketball coach at Radford University from 1988 to 1991, Old Dominion University from 1991 to 1994, the University of Dayton from 1994 to 2003, Clemson University from 2003 to 2010, and DePaul University from 2010 to 2015, compiling a career record of 448–386.