(ANN ARBOR) -- Frank Beckmann, the radio voice of Michigan football who began calling play-by-play for the Wolverines in 1981, is retiring at the end of this season. The school announced Beckmann's retirement Friday. Athletic director Dave Brandon says Beckmann's voice has become synonymous with some of the great calls in Michigan football history. Beckmann succeeded Bob Ufer as the play-by-play announcer for Michigan football in 1981. Beckmann is a member of the Michigan Sports Hall of Fame.