The University of Colorado football team apparently left California with more than a loss on the field -- several Buffaloes players claim they had jewelry stolen from their lockers during their matchup against UCLA on Saturday.
Deion Sanders' son, Deion Jr., shared the allegations in a postgame video posted on Sunday night ... showing multiple athletes in shock outside the Rose Bowl after discovering their valuables were taken.
Star safety Cam'ron Silmon-Craig was one of the players who claimed they were affected ... saying, "You're gonna play football and know your s*** safe. That joint messed up."
Another player stated he had just gotten his chain the day prior ... and whoever snagged his stuff took it right out of the box.
An investigation into the matter is underway, according to OutKick.
"The UCLA athletic department confirmed that a report was filed to the Pasadena Police Department following the UCLA-Colorado football game regarding items that were reportedly missing from the Colorado locker room," the school said in a statement.
"UCLA is in communication with law enforcement, Rose Bowl Stadium officials and the University of Colorado on the matter."
The Buffaloes fell to the Bruins, 28-16 ... falling to 4-4 on the season.
Coach Prime has yet to address the alleged heist.