Complex sentence: Previously he was the head coach at Brigham Young University, where he guided the Cougars to eleven straight bowl invitations, two outright conference championships and regular national Top 25 rankings.
Split into simpler sentences: Previously he was the head coach at Brigham Young University. At BYU, Mendenhall guided the Cougars to ten straight bowl invitations, two outright conference championships and regular national top-25 rankings.