First off, I am usually not a big height, weight, speed guy. Also I hated his block sled drill that went viral, absolutely horrible technique and in a game he can block absolutely no one this way.
Having said that, in game he is a really really good blocker, backside cut offs, across the formation, combo blocks with the Tackle at the Point of Attack. Surprisingly he excels at blocking on the perimeter and in the second level, but not by just blowing away much smaller DBs or LBs but he positions himself really well, he is a very smart blocker who knows and understands angles. He can read defenders if the path of the Defender doesn't allow him to catch the runner Washington immediately flips to the next dangerous defender which allows the runner at least 5+ extra yards. I wouldn't trust him to block a End in Pass Protection by himself or by himself at the point of attack, other than that I am certain he can execute all other blocks on the next level.
But what really made me decide on him is that he is an absolute mismatch on the passing front. I know he did not have the stats to back it up with Bowers being the receiving option for the Bulldogs, but he is a nightmare for opposing DCs and I am rather confident his receiving numbers will increase when he is used correctly. There is absolutely no way he can be covered 1-on-1, standing at 6'7'' with a huge wingspan, even if he is not the best route runner you need to have a safety over the top of him every time he is on the field. There is no DB in the NFL that can match his size and if there is nobody over the top he destroys defenses just by his pure size. Even if his route tree is limited to Seams, Overs, Shallows, Fades and Spot Routes he dictates coverages and alignments for the defense, like a true #1 X-WR would do, which is hugely important for an offense as it frees up everybody else.
Being a former basketball player he can catch, even excels at contested catches when posted up against a LB or DB and high points balls with ease.
He can be an In-Line Blocker, H-Back, split out wide in Goalline Situations and even play the slot a bit.
In todays NFL he is a huge chess piece because with his size and blocking ability Offenses can go from 20 personnel to Empty in an instant and DCs will never know what to expect.