Wills walked off under his own power and went into the blue medical tent. He later jogged to the training room to be further examined.
James Hudson, who started the first two games at right tackle, replaced Wills at left tackle.
Wills, though, returned to the lineup by the end of the third quarter.
The Browns lead the Steelers 16-14 with 2:31 remaining in the third quarter on Cade York‘s 31-yard field goal. The Steelers led 14-13 at halftime.