"He's a guy that's playing a heck of a lot better than how he played in the middle and first part of the season," Harrison said.
Quarterback siblings take center stage →
"Even when we were 12-0 and 14-0, he always preached finishing what we started, finishing the game," said former safety Rodney Harrison, a defensive leader in New England and now an analyst on NBC.
Do Packers chase 16-0 or rest key players? →