Adrian Peterson Warns Baker Mayfield About Common Pre-Draft Mistake!

Adrian Peterson says he's seen a bunch of NFL prospects make one big pre-draft screw up before the big day ... so, he's dishing out advice to Baker Mayfield to make sure the QB doesn't fall in the same trap.

Of course, Peterson was a stud at Oklahoma back in the day -- and says his fellow Sooner has all the right tools to be a star in the NFL.