He is not gay, but he usually gets hard when changing into his uniform.  Just being in the locker room with all his jock buddies.  Everyone naked and the smell of sweat and testosterone in the air.  He can’t help but bone up.  Once hard his cock is too big to smash down into a cup.  Then the feeling of his rigid pole rubbing around inside his uniform, keeps him hard thru the whole game.  His teammates have nicknamed him Woody. 

Being hard in the showers after the game is always the worst part.  His turgid meat slapping against his flat belly as his teammates run a train on his ass.  They figure any guy who gets hard in the locker room watching them change must be a fag who likes cock in the ass.  The fact that he stays hard while being fucked proves their point.  He does not understand why his body is betraying him.  He is not gay, he hates being a locker room cum dump.

At the end of the season his teammates will congratulate him on being team slut and for taking the hundreds of loads they have shot into his ass.  They will tell him it made a big difference in how the team played.  Being relaxed helped them focus on winning and made them the championship team they were.   Then they will tell him about the Viagra in his water bottle.