Patriots center Ted Karras was the only New England player to have played 100% of his unit's snaps this season, but he injured his MCL against the Texans and is expected to miss time. At the very least, Karras is likely to miss Week 14's game against the Chiefs; around 80% of MCL sprains to offensive linemen result in at least a one-week absence. Pending MRI results, our numbers give him a 50/50 chance of missing the rest of the regular season too, as around half such injuries cause an absence of four weeks or longer. Some offensive linemen return early with the aid of a knee brace, but even if he cannot, we cautiously expect Karras to return in time for the team's first playoff game.