There is almost definitely proof.
Originally Posted by Balla_Status
ESPN saw the broker’s footage of the Texas A&M now sophomore quarterback signing helmets, and while no money is exchanged on camera, Manziel, who seems unaware that he is being filmed, uses incriminating language.
“You never did a signing with me,” Manziel says. If the broker were to tell anyone about the signings, Manziel would not deal with him again, according to ESPN.
At another point, the broker asks Maniel if he would accept additional money to sign with special inscriptions, which he declined, as he indicated that he had done so before and it led to questions.
It's just that they won't talk to the NCAA. In fact there are supposedly six brokers claiming to have dealt with him. 4400 autographs with brokers claiming they paid him $7,500 per session. If they don't have the smoking gun yet don't be surprised if the NCAA has it soon. And it's pretty hard to believe he's going to do all this signing for nothing.
You ask me it's a bunch of bs rules that deserve to be broken and frequently are. But that doesn't change the fact that if they come down on athletes as hard as they did Bryant just for lying to an investigator and not actually breaking the rule then letting Manziel play is hypocrisy.