LOS ANGELES -- A second-quarter touchdown in USC's 30-28 win over California on Saturday shouldn't have counted, the Pac-10 Conference ruled on Tuesday.

"It should not have been a touchdown," Pac-10 commissioner Tom Hansen told the Los Angeles Times.

USC's Kareem Kelly was given credit for a catch, which cut California's lead to 21-10. Video replays showed that Kelly trapped the ball.

Pac-10 spokesman Jim Muldoon said the officiating crew would not forfeit its $825 per game salary, nor lose any further assignments. The game was graded on film by both teams, conference film graderse and Verle Sorgen, the conference coordinator of officials.

"I had a lot of issues with the officiating in that game ... the touchdown that wasn't a touchdown," Cal coach Jeff Tedford said Tuesday. "I don't think that was a stellar performance by the officiating crew by any means. You grade the officials every week, and we wrote down all the things that we saw that were poorly called. It goes on both sides of the ball. There was one where we had an illegal motion and it didn't get called. So we reported ourselves too, because that's what we have to do to help with the officiating. They have a tough job ... but I thought the officiating in the game was sub-par."

The call is the latest in a spate of missed calls in college football games. Penn State has asked the Big 10 to review calls in several recent games, and took officials off future assignments following Purdue's 24-21 loss to Wake Forest.

"It's an imperfect science, but we're convinced our officials care and that they miss very few calls," Hansen told the Times.