Dellin Betances is putting his faith in a cortisone shot.

The Yankees reliever received the injection in his right shoulder Saturday morning, hoping that it will be the answer to the stiffness that has lingered there since spring training. It usually goes away on its own, but a Friday MRI revealed a bone spur – which Betances has had since he signed in 2006, general manager Brian Cashman said – as the source of irritation.

“Obviously it’s a relief, just because there’s nothing structurally wrong,” Betances said Saturday morning in the Yankees clubhouse after getting the shot. “I know with this shot that in three weeks, with rest, I think – no, I don’t think, I know everything’s going to be right. I’m excited to help the team out to finish the season.”

Betances said he was not aware of the bone spur in the back of his shoulder until Friday, but it had never bothered him until this year. He is confident that he won’t eventually need surgery to remove it.

“[Team doctor Chris] Ahmad told me with this shot, you can pitch the rest of your career and not feel it again,” Betances said. “So obviously that’s a relief. I just can’t wait to get back. I’m a little impatient, but you got to just believe everything’s going to be right and take this time to get ready and not rush it.”

The 31-year-old setup man will be shut down for three weeks and it could be six to seven weeks before he joins the Yankees, Cashman said Friday night.

Betances struggled with diminished velocity during spring training and then was shut down with a right shoulder impingement. When his simulated game Thursday was a struggle – the stiffness hadn’t gotten any better, he said – Betances flew up to New York to undergo further testing.

One of 11 Yankees on the injured list – CC Sabathia trimmed the list when he was activated for his season debut Saturday – Betances is itching to get back with the rest of his teammates once they are finally healthy.

“It’s tough seeing all these guys get hurt,” Betances said. “… We’re not off to the start that we want, but that’s just baseball. It’s a long season and we have the guys in here, even the active guys, to get the job done. Obviously things will turn around.

“Once everybody comes back, then it’s going to be scary.”