The Redskins are bottom of the NFC East with a 3-6 record and are down in their potential tie-breakers with the Philadelphia Eagles and the Dallas Cowboys.
However, last season they were in an identical position and they managed to win their last seven games to finish with a 10-6 record, which secured a playoff berth.
"We know we're capable of it because we've done it before," Kerrigan told the Washington Post.
"But at the same time, every week at this point in the season is a one-week season. You've got to treat it like that."
The Redskins face the Eagles in their week 11 clash.