Continuity along the offensive line was one of the reasons the Patriots were able to have the season they had in 2016. They tossed aside the early-season experiementation that Bill Belichick favored at times in order to establish a starting five that could be relied upon, if healthy, start to finish.
They attacked 2017 with the same approach, but because of injury the consistency simply has not been the same. Both starting tackles, Nate Solder and Marcus Cannon, have missed time injured this season, and Cannon will sit out again on Sunday as he continues to deal with an ankle injury.
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The interior of the line has remained largely in place until this week when center David Andrews came down with an illness, missed two practices, and was ruled out.
On a line where familiarity is key, where the center is the one making the calls, the one in constant communication with Tom Brady, what now?
The Patriots will likely turn to second-year man Ted Karras, who has the ability to play both guard spots and also backed up Andrews for the vast majority of training camp. The 6-foot-4, 305-pounder was released at the end of camp, quickly signed to the Patriots practice squad, and then he re-signed to the active roster in Week 1 when Malcolm Mitchell was placed on injured reserve.
Karras, drafted in the sixth round in 2016 out of Illinois, was named a practice player of the week earlier this year and he earned some praise from Belichick before the Patriots took off for Mexico City.
"Ted works hard," Belichick said. "He loves football. He gets there early, stays late."
Belichick noted that Karras (nine snaps, all against the Broncos) hasn't played much this season, but he did see plenty of work early last season when he filled in for an injured Shaq Mason. He was the Week 1 starter at right guard in a win ver the Cardinals and he played 41 snaps in Week 2 against the Dolphins.
The Patriots offensive line could also potentially turn to Joe Thuney at center. He's practiced there before and got some experience at the position during his time at NC State. This seems like the less likely move since the Patriots would then have to deal with two new players at different spots -- center and left guard (whether the player replacing Thuney would be Karras or rookie Cole Croston) -- which could have a domino effect on the rest of the line.
However the Patriots choose to handle it, they'll face an interesting test south of the border. The Raiders feature a pair of talented pass-rushers in Bruce Irvin and Khalil Mack, who Belichick says play all over the offensive line, yet Oakland is tied for last in the league in sacks.