Offense line is one of the hardest units to judge at the NFL Scouting Combine. You really don't get a great understanding of their ability with the generic drills like the 40-yard dash and 10-yard split.
Instead, you have to look further into their performance in regards to the position-specific drills.
For the offensive line that includes the kick slide drill, which emphasizes protection of the quarterback and lateral quickness on the outside. While this is a major focus for tackles, it is also important for pulling guards like David DeCastro.
This article is going to focus on five players along the offensive line that performed much better than their numbers would indicate.