Here is the evaluation that NFL.com gave him during the combine:
Dever started at tackle for Notre Dame in his senior year, and he displayed some traits that garner some late-round consideration. He plays with his pad level too high, an obvious hitch in his game, but he has a strong anchor and fought to win many one-on-one battles throughout the year. He will have to hope to be given an opportunity to develop in the right situation in the NFL, as he could be years away from being able to compete on game days.
STRENGTHS: Dever exposes his frame immediately out of his stance, but once rushers are into his space he usually does a good job of anchoring and keeping a base enough to sustain a block. He displays decent technique in his pass set and fights to maintain a grip on his man despite rarely having leverage. He is a mauler in the run game and continues to develop his game.
WEAKNESSES: Dever can get caught off balance at times against fast bull rushers, as he stands straight up out of his stance on the snap. At times an oncoming rusher can get leverage on him to win at the point. He would have a tough time early on against physical, leverage-seeking pass rushers and will need to overhaul his technique to be able to even be competitive in camp.