Under Armstrong, Utah won 13 conference championships, seven in the Rocky Mountain Conference and six in the Mountain States / Skyline Six Conference. Armstrong's 25-year tenure is the longest of any Utah Utes football head coach and his 141 wins are the second most in program history. Armstrong also coached Utah's basketball and track teams and served as the school's athletic director.
During Armstrong's tenure at Utah, the team won a total of 13 conference championships—seven in the Rocky Mountain Conference and six in the Mountain States/Skyline Six Conference. Armstrong's 25-year coaching career is the longest for any Utah Utes football head coach, with his 141 wins second only to the program's all-time leader. Additionally, Armstrong coached both basketball and track teams at Utah and served as athletic director.