| Position | Player |
| LT | Anthony Castonzo |
| RT | Gosder Cherilus |
| T/G | Joe Reitz |
While the Colts' offensive line is their biggest weakness, the starting tackles inspire some confidence. The depth behind them, however, is extremely concerning.
Anthony Castonzo enters his third NFL season after a strong 2012 campaign, one in which he improved as the season went on and finished as one of the Colts' top offensive performers. Castonzo gets out and moves very well in run-blocking, and his pass protection grew more dependable each week during the second half of 2012. If he can play like that for all of 2013, the Colts will have one less position to worry about on the offensive line.
The team's biggest free agent-signing in 2013 was Gosder Cherilus, who has been a bit concerning during the preseason. Cherilus was signed after a career year in 2012, when he was one of the league's best pass protectors. The Colts signed him to keep Luck clean from the right side, but he's struggled to do that thus far. However, his body of work in the regular season can't be undermined by a few meaningless preseason games.
Overall, Cherilus is a solid right tackle, even if he is overpaid.
Despite the strong starters, the position won't earn an impressive grade, as the team has merely a traffic cone and duct tape behind them in case of injury. Okay, so Joe Reitz is a little more than that, but he's been playing guard for the last two years. Jeff Linkenbach can play tackle too, but he's been at guard throughout August. Don't be surprised if the Colts sign a depth tackle in the coming days.
