Beckum denied Mackey Award

Well, it looks as though Wisconsin will be shut out of the major individual awards this year. Fred Davis of USC won the Mackey Award for outstanding tight end, beating out Wisconsin's Travis Beckum and Missouri's Martin Rucker. My question is, why?

Beckum had 73 catches for 960 yards and six touchdowns. Davis had 49 catches for 753 yards and six touchdowns. Was it because Davis was a superior blocker? Maybe, I didn't watch USC's running game closely enough to tell, but I know that Davis is basically an overgrown wide receiver, sort of like Beckum.