DENVER -- One touchdown pass, one milestone.
Peyton Manning threw his first touchdown pass as Denver Broncos quarterback in the third quarter Sunday night -- a 71-yard connection to Demaryius Thomas -- and it was one for the record books.
It was Manning's 400th career touchdown pass.
He's also the fastest in NFL history to reach that plateau, needing just 209 games -- and four neck surgeries.
Dan Marino was previously fastest to 400, in 227 games. It took Brett Favre 228 games.
The pass actually traveled about 15 yards across the field, as Manning threw a quick hitch to Thomas, who turned upfield and did the rest of the work for the go-ahead score that gave Denver a 14-13 lead.
It may have felt like déjà vu for the Steelers. It was Thomas who hauled in the short slant pass from Tim Tebow and turned it into the 80-yard touchdown in overtime that ended Pittsburgh's season in the AFC playoffs in January.
Manning got No. 401 on Denver's next drive, hitting tight end Jacob Tamme on a 1-yard scoring strike that gave the Broncos the lead back, 22-19, after Ben Roethlisberger hit Mike Wallace on a 3-yard TD pass on the previous drive.