BYU head football coach Kalani Sitake recently said he knows changes need to happen on his coaching staff in order to improve on this season's 4-9 mark.

On Monday, the program announced that it has relieved Ty Detmer of his offensive coordinator duties after two seasons, although he remains under contract. He has also served as the Cougars' quarterbacks coach the past two seasons.

The Cougars averaged 17.1 points per game this year, which was 123rd in the country. BYU wrapped up its 2017 campaign with a 30-20 victory over Hawaii on Saturday.

"BYU will immediately begin a search for a new offensive coordinator. The new coordinator will make decisions regarding the offensive staff," the statement said.

Other offensive coaches currently on staff at BYU include Ben Cahoon (wide receivers coach), Steve Clark (tight ends), Mike Empey (offensive line) and Reno Mahe (running backs).

Detmer, who won the Heisman Trophy at BYU in 1990, joined Sitake's inaugural staff, being announced as the Cougars' offensive coordinator on Dec. 24, 2015.