This is AWESOME!!!
Baker Mayfield's high school football coach Hank Carter tells TMZ Sports he couldn't be more proud of his former QB ... and tells Cleveland to strap in, it's gonna be one helluva ride!!!
Baker played for Hank at Lake Travis High School in Texas -- where the QB led the Cavaliers to the 4A state title in 2011. Dude racked up 6,255 yards and 67 TDs during his HS career.
So, we had to ask Coach Carter how he felt about Baker's insane NFL debut -- and guess what, HE WAS FIRED UP!