Keith KartzKeith Leonard Kartz is an American former professional football center and tackle in the National Football League for the Denver Broncos. In 1990, he started in Super Bowl XXIV as a center for the Broncos.Early life and educationKartz was born in Las Vegas, Nevada, and went to San Dieguito [High School Academy|San Dieguito High School] in Encinitas, California. He was a high school football standout, but lost his senior season to knee injury.College careerA student at the University of California, Berkeley, Kartz played for the California [Golden Bears football|California Golden Bears football team]. At the end of his senior season, he was named to the All-Pac-10 first team.