Baker Mayfield Rips Kliff Kingsbury, You Treated Me Like Trash

Baker Mayfield opened up about why he hates his former Texas Tech coach, Kliff Kingsbury, so much -- essentially saying the guy kicked him to the curb when he got injured during a game.

The QB pulled no punches in his new FOX Sports docu-series, 'All The Way Up' -- saying Kliff treated him like a god when he stepped in and won 5 games as a freshman walk-on back in 2013.

But, when Baker sprained his MCL against Kansas -- Mayfield says everything changed.

"It went from being 'the guy' for Coach Kingsbury ... and then when I got hurt, it just changed a little bit ... not a little bit, a lot."

"All the sudden it was as if I hadn't played for him, hadn't done anything for him. It was just different after I got hurt."

Baker's father says the coach "completely withdrew his contact" with the QB after the injury -- "He didn't talk to Baker. He didn't include Baker in the meetings."

But, Mayfield says what REALLY pissed him off was when Texas Tech officials told him they didn't have a scholarship for him after that season ... despite the fact he was 5-0 as a starter.

"I've invested a lot into this and now you're telling me you don't have a scholarship for a guy who won 5 games after choosing to come here? That was the final straw for me."