What happened: Pro Football Focus ranked the San Francisco 49ers as the league's top offensive line. The Pittsburgh Steelers held their No. 3 position, while the Dallas Cowboys slotted in at No. 9.

Why it matters: San Francisco leads the NFC at 7-1 and recently added veteran receiver Keenan Allen to an offense already supported by top-tier protection. Dallas and Pittsburgh continue playoff pushes backed by top-10 line units after recent victories over Indianapolis and Cleveland.

What to watch: All three teams return to action looking to solidify their playoff positioning behind their offensive fronts.