Derek Jeter took groundballs on the field again Monday, though his most important work was conducted out of public view.

The Yankees captain ran on a treadmill, the final green light in his rehab since suffering a fractured left ankle in Game 1 of last year’s ALCS.

"[I’m] right where I need to be," Jeter said of his progression from the injury. "I’ve gotten the OK to do everything now. … I’ve gotten all the green lights I need."

Speaking from the driver’s side of his Mercedes as he signed autographs for fans outside the Yankees minor league complex, Jeter said he’s increased his movements in the field.

"I haven’t used my legs, so I have to get back to [doing that]," he said.

Jeter, 38, expects to start opening day and doesn’t view this as an abnormal spring. When asked how many at-bats he’d need to be ready, the captain gave a quick, deadpan response: "Twenty-three, with a couple of walks."

Curtis Granderson noted that Jeter "wasn’t hobbling around or wincing in pain or anything" while on the treadmill. "To me, it looked like he was just warming up. … He’s going to make sure he’s 100 percent before he comes back."

The advanced age of this club isn’t a concern of the captain’s.

"If you do well, they say it’s experience. You don’t do well, they say it’s age," Jeter said. "I like our team. Let’s see what happens."

BRIEFS: Yogi Berra won’t be attending camp as a guest instructor, according to Dave Kaplan, director of Berra’s museum in Little Falls. In an email to The Associated Press, Kaplan said Berra’s health was pretty good but that the 87-year-old Hall of Famer is limiting his travel.