As he was reading the Broncos' injury report after practice, Fox said, "Peyton Manning, did not participate."
But before even seconds had passed and Twitter had exploded, Fox realized what he just said.
"No, I'm sorry. ... I was on the wrong day. I'll move over a column," Fox said with a smile. "Full [participant]."
It was business as usual for Manning, who was held out of his first practice as the Broncos' quarterback Wednesday because of a minor ankle injury. Manning took his usual snaps with the starters and will play Sunday against the Washington Redskins.
"I thought he looked fine," Fox said.
"He was good. He was throwing the same," offensive coordinator Adam Gase said.
Gase said a benefit of the Broncos' medical staff keeping Manning out of Wednesday's practice -- he did throw in the walk-through -- was the work backup Brock Osweiler received.
"That was good to see, his development," Gase said. "He hasn't had a rep in so long, and to go out there and execute the way he did was impressive."
Osweiler has played just 16 snaps this season, all against Philadelphia when Manning did not play in the fourth quarter. He is 2-of-3 passing for 10 yards.