I think he was getting beat on the field, and he realized it was better to blame mental anguish, than to get CUT and be the dude who wasn't good enough for canadian football.
at least now, he can tell the story of the stress he felt. He played in one game, he was the first openly gay pro player to do that.
I'm sure he'll get a TV show, be a guest on cable news, write a book, etc. Better to be the man that walked away, than the man cut.