American Football NCAA Approved Ruling 1-4-2
I. The Team A player who started the game wearing jersey number 77 enters the game wearing number 88. RULING: The player must report to the Referee who, without stopping the game or play clock, uses his microphone to announce the change and the relevant flank official informs the opposing head coach. If A88 fails to report it is a foul for unsportsmanlike conduct.