The good news is Brian McCann stayed in Tuesday night's game.

The bad news is the catcher isn't sure on his status for Wednesday night.

As Dellin Betances struggled with the feel of his curveball in the seventh inning, McCann felt some discomfort in his left knee as he tried to block one of the handful of balls the righthander buried in the dirt.

"When I pushed off, the inside of my knee kind of stretched a little bit," McCann said. "I'm just hoping I wake up tomorrow and it's not stiff."

Joe Girardi and trainer Steve Donohue came out to check on McCann, who stayed in. He played the last inning at first base.

"My adrenaline was going, so I really couldn't feel anything," said McCann, who hit his 18th homer, a three-run shot in the nine-run bottom of the seventh.

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"Just got it checked out and things are all right."

Still, Joe Girardi said "I am" when asked if he was concerned, adding, "I'm curious how he's going to feel tomorrow."

Ackley on DL

Dustin Ackley's career as a Bomber lasted all of three at-bats before the utility man found himself on the DL, placed there Tuesday with a right lumbar strain.

"Unfortunately, timing is everything and we had the bad timing in terms of when he had an issue materialize," general manager Brian Cashman said before the game.

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Cashman said Ackley had no back issues in Seattle. Ackley had an MRI on Monday that showed "a herniated disc," Cashman said.

"We're optimistic after a 20-30-day stint, we'll get a player back for us," Cashman said.

Cashman said Ackley was given an epidural shot.

Ackley said he's had "some lower-back soreness in the past," but "just minor stuff."

"I mean everybody goes through stuff here," he said. "But never this."

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Pineda out till September

Cashman said Michael Pineda, placed on the DL on Thursday with a right forearm strain, won't be back until September at the earliest.

With Erik Bacharach