Could he be All Pro as a rookie? Sure, but its incredibly unlikely. However, That is not what I am saying at all. First, I am describing his weakness listed in scouting reports as it relates to his performance evaluation against college competition. Battles with NFL competition could, and should, identify other areas of weakness that could be improved. Second, he's not top 5 in arm length across the entire pool of NFL interior linemen. I am certain i could easily find more than 5 interior linemen, specifically centers, across the league with longer arms. It is just that one of his weakest traits identified from NCAA reps (length) happens to be a weakness shared many other highly successful interior NFL linemen in general, because said weakness is less impactfull at those positions. The top NFL Centers tend to share that same weakness because other attributes at that position carry more value, and if they were very good across the board in addition to having 35+ inch arms, they wouldn't be playing Center. If length wasn't a weakness of his as a player, he probably have been a first round pick given his other traits while probably playing OT at Texas AM.