Anthony Castonzo: B+
Castonzo did allow a few pressures on Luck, but was pretty solid for most of the day, and was a rock in run-blocking. The Colts had a lot of success running to the left side, and Castonzo was one of the biggest reasons for that. When he can get to the second level, the Colts generally run well.
Joe Reitz: B-
Reitz, like Castonzo, allowed a few pressures, but was generally pretty reliable at guard, especially in run-blocking. When asked to pull and block, he did a great job, showing why the Colts were so high on him last season.
A.Q. Shipley: C+
Shipley struggled at times against a dominant Houston front, but still seems to be a viable replacement option for Samson Satele, who has had an awful year.
Mike McGlynn: F
Dominated by J.J. Watt, McGlynn struggled to get any kind of push in the run game, and allowed Watt and company to make Andrew Luck's life very uncomfortable all day. Luck should be grateful to be alive after the way McGlynn played today.
Jeff Linkenbach: F-
Somehow playing even worse than his next-door lineman, Linkenbach managed to allow penetration that even disrupted runs to the other side of the field on Sunday on at least two occasions. He also was a big reason why Luck was pressured so heavily, as Linkenbach and McGlynn were seemingly overwhelmed on every single dropback.