UCLA’s men’s tennis team was stripped of 2008 Pac-10 title for using an ineligible player, and USC was awarded the title.
Here is the release from the Pac-10:

PAC-10 PENALIZES UCLA FOR MEN’S TENNIS VIOLATION, USC DECLARED 2008 TEAM CHAMPION

WALNUT CREEK, Calif.–The UCLA men’s tennis program has been penalized by the Pacific-10 Conference for allowing a student-athlete to compete while ineligible during the 2008 season. The Conference determined that UCLA would be required to forfeit all singles and doubles matches in which the ineligible student-athlete participated during the 2008 season.
Based on UCLA’s team results after the ineligible student-athlete’s matches were forfeited, the results of two Pac-10 matches were subsequently reversed – UCLA-USC on April 12, 2008; UCLA-Arizona State on April 18, 2008.
By adjusting the final team standings to include a victory awarded to each USC and Arizona State, USC has been declared the 2008 Pac-10 men’s tennis champion. (corrected 2008 final Pac-10 men’s tennis standings listed below).
The violation was self-reported by the institution.

2008 Final Pac-10 Men’s Tennis Standings (Revised)
1. USC 7-0
2. STAN 5-2
UCLA 5-2
4. Arizona State 4-3
California 4-3
6. Washington 2-5
7. Arizona 1-6
8. Oregon 0-7