TUCSON — On the heels of Martin Luther King Jr. Day, the University of Arizona introduced the football program’s first African-American head coach. History was made in college football for the second time in the state with the hiring of Kevin Sumlin. UA’s rival, Arizona State, brought aboard its first African-American head football coach, Herm Edwards, in December. “Some say it’s a historical day, and you know what, it is,” Arizona athletic director Dave Heeke said. “We broke a barrier.