Mullen football coach Tom Thenell has resigned, the school announced on Tuesday.
Thenell took over at Mullen before the 2012 season. His teams were 34-31 in six seasons.
"Tom is passionate about football, but even more passionate about making a difference in the lives of young men," Mullen athletic director Vince Massey told the school's website. "He will be sorely missed leading the football program."
Before joining Mullen, Thenell coached at Bear Creek from 1992-2011. His overall record is 183-112, according to Mullen.
Mullen was 5-6 this past season, advancing to the Class 5A playoffs. The Mustangs reached the postseason each of Thenell's final three seasons.
The opening at Mullen is the latest football job to come open this offseason. Find all of football's coaching changes here.