Prior to being a head coach, Plunkett played two seasons at Centenary College, averaging 17.9 and 14.4 points per game, respectively.
[2][3] Plunkett served as the seventh head coach of the University of Oklahoma women's basketball program from 1993 to 1996.
He had served as assistant coach for three years prior to being hired to replace Gary Hudson.
The following year, he led them to a 21–8 record and an invite to the 1995 NCAA Division I women's basketball tournament, where they made it to the Second Round before losing to Louisiana Tech 48–36.
This biographical article relating to a United States basketball coach is a stub.