DeMarco Murray -- Ex-Teammate Apologizes ... My Wife Didn't Bang You After All

DeMarco Murray did NOT score with his ex-teammate Brennan Clay's wife after all ... at least according to Clay who's snuggling his wife again -- but also eating a big serving of crow.

Clay and Gina D'Agostini look like the picture of wedded bliss in the pic he just posted ... where she appears to be naked, and he's laying on top of her. Clay captioned the pic ... "Jumped to a conclusion that wasn't true ..can't judge a situation without knowing all the facts ..I apologize .."

It's a huge about face from the former Oklahoma Sooner player ... who recently blasted DeMarco, accusing him of banging his wife of just 4 months.

Clay claimed he had more than 50 incriminating texts to prove Gina and DeMarco were cheating.
Unclear what changed his mind. We've reached out, but no word back from him yet.