The starting safety for the USC football team claims he got hit with a 28-MONTH suspension for an underage boozing incident back in February ... and he's so upset, he's leaving the school.
19-year-old Bubba Bolden was a HIGHLY recruited safety out of Bishop Gorman High School -- and was touted as a future star for the Trojans.
But, Monday Bolden announced he's leaving SC and it appears it's all because he feels he was unfairly punished over an incident involving alcohol and trash talk.
Bolden acknowledged he was at the party -- and "participated in mutual trash talking with fellow partygoers" -- but claims he left without incident and has witnesses that can back him up.