Brent Musburger is calling it a career at ESPN after being the play-by-play man in the booth at sporting events enjoyed by millions of Americans, most prominently when he was the lead voice for CBS Sports in the 1980s. Musburger, who is 77, said he's leaving active sportscasting to help his family get a sports handicapping business started and to use some of the millions of airline miles he's earned for some fun travel. Both Musburger and ESPN say comments about Oklahoma football player Joe Mixon that were criticized as insensitive during the Sugar Bowl earlier this month had nothing to do with his exit. More...