UCLA quarterback Josh Rosen -- a 2016 Heisman contender -- is calling out the NCAA ... essentially saying it's BS that his school just signed a $280 MILLION endorsement deal but the players won't see a dime.
FYI, UCLA just inked the largest apparel contract in NCAA history -- with Under Armour ponying up $280 mil for exclusive rights to outfit UCLA athletics for the next 15 years.
Rosen -- pointing out the irony of the school raking in a fortune while the athletes don't get paid a cent -- reposted a newspaper headline about the deal with a snarky comment.
"We're still amateurs though ... Gotta love non-profits #NCAA."
UCLA isn't the only school to sign megadeals in the last few months -- Michigan, Texas and Ohio State have all inked 9-figure deals.
Meantime, Rosen isn't even allowed to have a hot tub in his dorm.