At a time of significant change in the Big 12, Oklahoma State went for stability.

Longtime football coach Mike Gundy has signed a five-year contract extension that will pay him $4.2 million this year, followed by a $125,000 raise each year afterward.

Gundy, a former quarterback at Oklahoma State, is the school's longest-serving and most successful head football coach with a 104-50 record. His current contract, which paid $3.9 million annually, was set to expire at the end of 2019. Upon approval by the Oklahoma State/A&M Board of Regents, the agreement announced Tuesday will automatically roll...