A Jets spokesperson said that Mangold's status was day to day.
"It went numb there, which is always a little disconcerting," Mangold said Friday. "It's a shock to the system but seems to be doing better today."
In the first day of the tackle-to-the-ground drills set to mimic the final moments of a scoring drive, running back Shonn Greene took a handoff from Mark Sanchez and leapt over the pile. When players came off the scrum one by one, Mangold was crouched on the bottom and remained there for a few minutes as the medical staff rushed over.
It was a scary moment as several players took a knee near Mangold until they were told to move back. Once Mangold left the field, the goal-line drills came to an end, and the Jets worked farther up the field but eased back in the intensity for the remainder of practice.
"When you see a guy down there, oh, man, you hold your breath," Jets coach Rex Ryan said. "You still have to go on, but ... I went over there and he got his feeling back in his hands. You could see the relief, not just on his face, he probably saw it on mine. I saw it on his. That's a scary deal."
Mangold didn't participate in Friday morning's walkthrough.
Brandon Moore, who had hip surgery in the offseason, was activated from the physically unable to perform list on Friday.
"I'll get my pads on and move around a little bit and get back into the swing of things," Moore said.
Jane McManus is a reporter and columnist for ESPNNewYork.com.