Troy Polamalu provided the Pittsburgh Steelers with the spark they needed in Week 14 against the Bengals.
After Cincinnati took an early lead, Polamalu intercepted Carson Palmer and ran 45 yards yards for a touchdown.
The play changed the complexion of the game and got those bumbling Bengals talking on the sideline.
Polamalu's heroics have become the norm in recent years, with a number of timely interceptions and bone-jarring hits on his resume.
He isn't the only star safety in the AFC North with a knack for making plays.
Ed Reed is aging and constantly seems to be banged up, but he hasn't stopped producing.
And when he gets the ball in his hands, watch out.
So where do Polamalu and Reed rank among the list of the NFL's best game-changing defenders?
Let's take a look.