Derek Jeter was out of his walking boot and back on the field at Yankee Stadium for the first time since he fractured his left ankle for a second time in March, but he still is not ready to predict when he will be able to play again.

“As soon as possible,” Jeter said . “That’s it. I’m not gonna put a date on it. Last time I put a date on it, it didn’t work, so as soon as I can play, I’ll play.”

But the captain did take a step forward Wednesday, playing catch before the Yankees’ 9-4 loss to the Mets at the Stadium.

“I just started throwing today,” said Jeter, who got out of the boot on Friday. “I’ve got another test in the next week and a half. After that I’ll know.”

Until then, the shortstop may field grounders hit directly at him or take some swings. He won’t run or jump unless he gets clearance from next week’s CT scan.

Jeter said he has no pain in the ankle, though he admitted he hasn’t tested it much.

“It’s been good, but I haven’t done anything besides walk,” Jeter said. “It’s pretty good doing that, but you can’t fake out a CT scan.”

Jeter, who originally fractured his ankle in Game 1 of the ALCS in October, still believes he suffered the setback before he was scratched from a spring training game in Clearwater on March 19.

“I don’t come out of games or not play in them just because it’s stiff,” Jeter said. “If I had to guess, I’d say that’s what it was.”

He said the setback will not impact how he treats his rehab this time around.

“I’ll do exactly what I’m told to do, just like I did the last time,” Jeter said after tossing with video coordinator Anthony Flynn. “It was just a freak incident, I guess, which caused it to break again. I don’t know why. I don’t think anyone knows why.

“I just think it wasn’t strong enough. But it’s a guess. Let’s make sure it’s strong enough and hopefully there’s no setback.”

Though he would not specify a date for a potential return, Jeter said he would not go through a full spring training-type regimen despite his extended absence.

“The team’s not in Florida for spring training, so I don’t need it,” Jeter said.