LOS ANGELES (AP) -- Southern California formally complained that ABC-TV's Brent Musburger revealed privileged information in play-by-play commentary during Saturday's game against Nebraska. The university sent a letter to ESPN, which oversees sports programming on ABC, saying Musburger, with less than 10 minutes to play and the Trojans leading 21-10, began describing how USC quarterback John David Booty lets receivers know he has spotted a certain kind of coverage.