DeWitt Thompson Weaver, Sr. (May 11, 1912 – January 19, 1998) was the head football coach of the Texas Tech Red Raiders from 1951 to 1960.
He was the first head football coach at Texas Tech to win a bowl game during his first season—an accomplishment unmatched at Texas Tech until Tommy Tuberville's first season, in 2010-2011.
In 1956, he became the first college coach to defeat the Texas Longhorns in a season-opener in Austin. He amassed a 49-51-5 record.
From 1951 to 1960, he also served as the athletic director at Texas Technological College, as Texas Tech University was then known.
His son, DeWitt Jr., is a professional golfer who won twice on the PGA Tour.