"“There weren’t many bright spots on the Colts offensive line in 2015, but Anthony Castonzo was one,” writes Miller. “In his fifth season out of Boston College, Castonzo was consistent and solid—two words that any offensive linemen would gladly be associated with. Castonzo is as tough as they come and is dependable, starting 73 games and missing only three since taking over as the full-time starter five games into the 2012 season. He doesn’t do anything that stands out as necessarily being great, but he is good at many things.Castonzo is an explosive pass protector with tremendous range to cover a lot of ground. He consistently kicks to his spot, maintaining even weight distribution so that he precisely settles and builds his house to anchor. Castonzo wins with hand placement often and is good with latching with his hands and controlling defenders once he is on his landmark.Castonzo does not mind getting after it in the run game. He consistently generates force on his base blocks to knock defenders off the ball, and he plays with a powerful base that allows him to sustain and drive through stalemates.”"
While Castonzo experienced somewhat of a down season for his high standards (much like the rest of his Colts teammates), there’s no question that he remains one of the best starting left tackles in football.
Despite suffering an MCL sprain late in the season, Castonzo still started 13 games for the Colts and was consistently the team’s best offensive lineman.
Quite frankly, he’s been the offensive line’s anchor, as those 3 starts are the only ones he’s missed over the past 4 seasons.
Ironically, he was also Pro Football Focus (subscription) 13th best rated left tackle overall with a +3.1 grade overall this past season.
The 27 year old left tackle was rewarded with a lucrative 4-year extension to begin last season and figures to be a staple in the Colts offensive line for years to come.