An MRI taken on Friday showed Alex Rodriguez has tendinitis in his right hip flexor, but Yankees manager Joe Girardi said he was told the injury is most likely not related to the major hip surgery A-Rod had last spring.

Girardi, who made the comments after speaking with team trainer Gene Monahan, said the Yankees third baseman is day-to-day and could even be available to pinch hit in Friday night’s game against the Astros at Yankee Stadium.

“That’s good news to me,” said Girardi, who only minutes earlier – before the MRI results came in – said he was “worried” the injury that forced A-Rod out of Thursday’s game in Baltimore could be related to the surgery.

“There’s concern that there could be something going on in the hip,” Girardi said before the MRI results were relayed to him. “There’s always concern because of what he’s been through. If he hadn’t had the hip problem, I probably wouldn’t even think about it. Because he’s had a history of it, we’ve got to worry.”

Girardi said Rodriguez was examined by Yankees team doctor Chris Ahmad, who would consult with Dr. Marc Philippon, the Colorado-based orthopedic surgeon who operated on A-Rod last March to repair a torn labrum. 

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Girardi said he based his belief that the new issue is not related to the surgery on the location of the injury – the front of the hip rather than near the socket.

“To me, they’re totally separate, from the way I understand it,” he said. “To me, the good thing is it’s not his labrum – what he had surgery on – it’s not the hip socket, which he had surgery on. So to me this is about as good a news as we could have got.”

Rodriguez has been troubled since Sunday with what the Yankees were calling a groin issue. He left Thursday’s game after one inning and later reported his groin had stiffened after batting practice.

Rodriguez did not tell Girardi he was injured on Thursday before the game, but the manager said he was not upset with being kept out of the loop. Girardi said he didn’t know his cleanup hitter was injured until he saw A-Rod motion to his backup, Ramiro Pena, to get ready to come into the game.

Pena was in the lineup on Friday at third base. Robinson Cano batted cleanup.