PITTSFORD, N.Y. - Bills rookie receiver Sammy Watkins is day to day after tests confirmed a diagnosis of bruised ribs, a person close to the situation told The Associated Press on Monday.
The person spoke on the condition of anonymity because the team has not provided an update on the first-round draft pick since Watkins was hurt in a 19-16 preseason loss at Pittsburgh on Saturday.
Coach Doug Marrone declined to provide a timetable and would only say Watkins would not practice on Monday, when the team returned to its training-camp facility in suburban Rochester.
"He's not practicing today, and I'll be ready to practice without him," Marrone said. "He's not out there, and when he comes back, I don't know."
Watkins' agent Tory Dandy told the AP his client "will be fine" and described the injury as being "just a bruise." Dandy added Watkins could have returned during the game after being hurt on the opening drive.
The receiver left the field holding his left side where he was kneed by leaping linebacker Ryan Shazier during a pass play.
Watkins spent part of practice riding a stationary bike on the sideline.
It's too early to determine whether Watkins will be cleared to play on Saturday, when Buffalo (1-2) hosts Tampa Bay (0-2).
The Clemson product was a key off-season addition for the Bills. They traded their 2015 first-round draft pick to Cleveland in order to move up five spots and select Watkins with No. 4 pick.
He's already shown glimpses of his dynamic potential by making numerous highlight-reel catches during camp.
Marrone announced starting left tackle Cordy Glenn has been cleared for team drills. Glenn missed the first three weeks of camp because of an illness.