"We'll keep him out through the weekend and then we'll go from there," Lewis said, via the Bengals' Twitter account.
The team's radio play-by-play man, Dan Hoard, described the incident as a "major scare" in a recap of the Bengals' first day of camp on the team website:
"[Green] was going after a deep ball, got tangled up a little bit on the sideline and immediately went down and did not get up," Hoard said. "The training staff rushed over to attend to him, and about three minutes later, A.J. was on his feet, walking around under his own power with no noticeable limp."
Green did not return to practice and underwent a precautionary MRI. Hoard tweeted Friday that Green "confirms no structural damage" was seen on that MRI.
The Bengals' preseason opener falls on Aug. 8, against Atlanta in an ESPN-televised game. Though it sounds as if Green may be ready to go well before then, Cincinnati would have no reason to rush him back anytime in the near future. Green tops the list of the Bengals' more irreplaceable players, especially given the team's lack of depth at receiver. The 24-year-old Green turned in a spectacular 2012 season, catching 97 passes for 1,350 yards and 11 touchdowns, while cementing his status as one of the league's rising stars.