FLORHAM PARK, N.J. - Muhammad Wilkerson did not participate in workouts Saturday because of the hamstring injury he's dealing with.

"Yeah, there's a minor little setback," said Wilkerson, who tried to take part in team drills earlier in the week. The defensive end strained his left hamstring in team drills two weeks ago (Aug. 2) and has been listed as day-to-day. He said he is feeling better each day and that an MRI did not reveal anything more than a strain.

Asked if he thinks the injury might linger into the regular season, he said, "Next question."

Wilkerson said he doesn't know if he will play in Friday's preseason game against the Falcons. Coach Todd Bowles said he might sit Wilkerson even if he is healthy enough to play. Said Bowles, "I'll always err on the side of caution with him, because you don't want him to have a setback, especially live in the game."

Jet streams

Tight end Jace Amaro missed practice Saturday because of a shoulder sprain suffered Thursday night against the Lions. Bowles said he is "week to week'' but believes Amaro should be ready for the regular season . . . Linebacker Erin Henderson is out with a sprained knee. Bowles said it might keep him sidelined about a week. He also said Henderson was one of the few defensive players who played well against Detroit.

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Bowles said he has no idea when RB Stevan Ridley (knee) might get off the physically unable to perform (PUP) list. However, the coach didn't seem to think it would be in the immediate future.

"I've seen him run full speed straight ahead; I've seen him make some cuts,'' Bowles said of Ridley. "But I haven't seen him make some cuts, full speed, where he can't think about it, when there's a lineman there, and he's got to jump cut and go to the other side. I haven't seen that part yet.''

Bowles said he has spoken to QB Geno Smith since he underwent surgery to repair his broken jaw, but said he has no update on the original 6-10 week timetable for his return. Bowles did say there's no rush to sign another quarterback, and is still talking to Matt Flynn, who it brought in for a physical on Friday.