He finishes blocks off better than any tackle in this draft. He's got long arms to steer pass rushers outside so the quarterback and step up in the pocket. He's got great feet so nobody will ever blow past him off the snap. He gets great leverage in the run game, and moves his guy off the line of scrimmage. He is a much better run blocker than his weight suggests due to his strength and athleticism.
Even though he is underweight (he's only 20 btw), he still is more physical than most tackles in this draft, and I can't think of a single one that is more athletic than he is.
The only question is can he put on the weight necessary to not get pushed around. While it's not guaranteed that he can, it is probable that he will. And if he infact does put on that weight, then look out. I see him as a better run-blocking D'Brickashaw Ferguson.