|Born||October 19, 1963|
|Alma mater||Oregon ('90)|
|1981–1982||Central Oregon CC|
|1982–1983||Southwestern Oregon CC|
|Coaching career (HC unless noted)|
|2015–2016||Oklahoma State (asst.)|
|Head coaching record|
William Theodore Grier (born October 19, 1963) is an American college basketball coach. He is currently an assistant coach at the University of Colorado and was formerly the head men's basketball coach at the University of San Diego.
Grier was born in Silverton, Oregon, and he attended Cottage Grove High School in Cottage Grove, Oregon. He began coaching freshman basketball at his alma mater in 1986. He left to attend Central Oregon Community College and Southwestern Oregon Community College, where he played basketball, before earning a Bachelor of Science degree from the University of Oregon in 1990.
College coaching career
Grier coached at Creswell High School in Creswell, Oregon before becoming an assistant college coach at Gonzaga University in 1992. He remained at Gonzaga until 2007, when he was hired to coach at USD. In his first season, Grier coached the Toreros to an upset of Gonzaga in the finals of the WCC tournament. The Toreros received a #13 seed in the 2008 NCAA Men's Basketball Tournament and upset #4 seed Connecticut in the first round.
On August 24, 2015, Grier was announced as an assistant at Oklahoma State University, pending approved by the board of trustees. 
Head coaching record
|San Diego Toreros (West Coast Conference) (2007–2015)|
|2007–08||San Diego||22–14||11–3||3rd||NCAA Second Round|
|2013–14||San Diego||18–17||7–11||6th||CIT Quarterfinals|
|San Diego:||117–144 (.448)||51–73 (.411)|
Postseason invitational champion
- "Bill Grier Named USD Men's Basketball Coach" (PDF). 2007-08 San Diego Men's Basketball Quick Facts. USDToreros.com. p. 5. Retrieved 2008-04-01.
- "SI.com". CNN. April 3, 2008. Archived from the original on June 29, 2011.
- "Tad Boyle hires Bill Grier as assistant coach". CUBuffs.com. 2016-03-28. Retrieved 2016-04-05.
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