I hate to get sucked into the narrative, but in this case it's true: his arms *are* noticeably short. And at left tackle, one of the most demanding positions in football, any flaw is going to be magnified (exposed).

The issue with his wingspan is he gets beaten to the punch. Defenders can get to his chest quicker and stun him, which is usually a play-killer. A lack of reach also makes the route to the pocket more direct.

It's a shame, because he has left tackle footwork. He gets into his set effortlessly, with a smooth, natural kick slide. As far as moving him to guard, he would need some improvement in the run game. He lunges and ends up on the ground too much, plus he's not the strongest guy to begin with. You can get away with subpar run-blocking at left tackle (many in the NFL do), but not inside.

His footwork and technique are good enough to give him a start at tackle. I wouldn't go higher than third round, though, because he might end up as an in-between player with mismatched skills.