The guy is just a playmaker. He wants the ball; he wants to do something with it.
He has freakish athletic ability.
He doesn't need a designation. Who cares whether he's labeled as a big WR or a smallish TE? Line him up where ever to get him the best match up and then just turn him loose.
Need a blocking TE? Plenty of those guys around. They're just guys who are 25 pounds short of being a OT.
