Ben Roethlisberger threw for 311 yards and two scores as the Steelers beat the Broncos 26-21 in Pittsburgh.
Diontae Johnson caught eight balls for 92 yards and a touchdown while rookie Chase Claypool had three catches for 88 yards, including an 84-yard connection for a touchdown.
James Conner ran the ball 16 times for 106 yards and a touchdown for Pittsburgh, which moves to 2-and-0.
The Steelers will welcome the Houston Texans to town next Sunday.
It will be a special day in the Watt household as it will be the first game to feature all three Watt boys -- Derek and TJ for the Steelers, and JJ for the Texans.
Houston fell to 0-and-2 when they lost to Baltimore on Sunday.
(Photo by Joe Sargent/Getty Images)