LOS ANGELES -- USC athletic administrators have banned all football players from attending a trip to Las Vegas organized by current NFL player and former Trojans defensive end Everson Griffen this weekend for the Super Bowl, a school spokesperson confirmed Thursday.

Athletic director Pat Haden and vice president for athletic compliance David Roberts sent an e-mail to the team and the same e-mail to all student-athletes Thursday, saying they believed former USC linebacker Jordan Campbell was also behind the trip.

Campbell, the e-mail notes, is or was affiliated with 1st Round Entertainment. 1st Round Entertainment is an event-planning organization run by USC student Teague Egan, a former NFL agent who had his license revoked by the NFL Players Association in December after he was found to have given a free golf cart ride to USC tailback Dillon Baxter.

"Because of the NCAA rules concerning gambling, impermissible extra benefits and the conduct of agents, we believe that there is a significant chance that the eligibility of any student-athlete who participates in such a trip would be jeopardized," Haden and Roberts wrote in the e-mail, which was obtained by ESPNLosAngeles.com. "Therefore, you are not permitted to partake or participate in the Super Bowl Weekend trip that has been arranged and promoted by Mr. Griffen or Mr. Campbell under any circumstances."