ANN ARBOR, Mich. (AP) - Dan Dierdorf is ending his brief retirement as a broadcaster to be the radio analyst for University of Michigan football games this fall. The school and IMG College announced Thursday that the Pro Football hall of famer will work with play-by-play announcer Jim Brandstatter, one of his teammates while playing for the Wolverines. Brandstatter has been Michigan's radio analyst for football games with play-by-play voice Frank Beckmann, who retired after last season. Dierdorf said in November he was ending his broadcasting career because the traveling was getting to be too tough with two artificial knees, two artificial hips and a bad back. He was an NFL analyst for CBS Sports last season and spent 12 years on ABC's "Monday Night Football."