The tackles have been up and down this year due to injuries and matchup problems, and Koppen seems to land on his ass once or twice a game, but we've got solid guards and we're deep, deeper than we've ever been at this stage of the season.
Apart from the Chargers, with absolute studs on the tackles in McNeill and Olivea and a sturdy interior lead by Goff, I can't think of an O-line I'd be more comfortable with. KC is a terrific drive blocking outfit but even without much pass rush Trent Green always seems to get grass stains on his jersey. Baltimore can't run block, or Lewis can't run, or maybe both. The Colts O-line does everything acceptably but that's only because it would take 13 defenders to fully stop the whole offense.
This team has won with much, much worse in the trenches.