Minkah Fitzpatrick ran a fumble back 43 yards in the second quarter to help lift the Steelers to a 17-12 win over the Rams at Heinz Field.
Fitzpatrick also had an interception on the final drive to ice the game for Pittsburgh.
Mason Rudolph threw for 242 yards and a score while James Washington had six catches for 90 yards and a touchdown.
Pittsburgh is 5-and-4. Former Pitt Panther Aaron Donald sacked Rudolph in the fourth quarter for a safety to bring the Rams back within two points.
The Steelers will take on the Browns in Cleveland Thursday night.