BALTIMORE — On a hot, humid night at Camden Yards, Dellin Betances said he “felt like crap” on the mound.

The unpleasant conditions, he said, caused him to lose the feel of his knuckle-curve and that made for what Aaron Boone called an “interesting” eighth inning in the Yankees’ 4-1 win over the Orioles.

“I didn’t have my put-away pitch, the knuckle-curve,’’ Betances said. “I was sweating so much that every time I gripped it, it slipped. It’s the first time that’s happened.”

After getting Jace Peterson — who played three games with the Yankees earlier in the season — on a comebacker to start the inning, Betances walked Adam Jones and Manny Machado to bring up Mark Trumbo, representing the tying run.

Betances drilled Trumbo with an 0-2 knuckle-curve to load the bases with one out.

Following a visit from pitching coach Larry Rothschild, Betances recovered to fan Jonathan Schoop and then got Chris Davis, who was in a 7-for-64 slide, to fly out to center, preserving the lead.

“When I got to two strikes with Trumbo, I couldn’t throw the knuckle-curve where I wanted it,’’ Betances said. “With Jones, I threw one that was terrible. It was brutal.”

An outing like Friday’s could have resulted in disaster, but this one did not. On Friday, the right-hander said he was able to go to his slower alternative, the slurve.

“That bailed me out,’’ Betances said. “That’s what I struck out Schoop with.”

Perhaps the most important part of the inning was the fact his manager didn’t pull him.

Asked what he was thinking when he watched Betances put three runners on, Boone grinned and said: “Get the next guy.”

“I felt like the stuff was good,’’ the manager said. “He got a little offline there, but the thing with Dellin is he’s so difficult to hit. As long as he gets back in the strike zone, I know he can wiggle his way [out of it].”

Friday was the third straight outing in which Betances walked at least one batter. He has issued five free passes in his past three innings.

“He did a pretty good job of self-correcting,’’ Boone said. “For the most part, he’s been really, really good. You understand if he gets a little out of line from time to time and you’re gonna have to live with that.”

Betances would rather not, saying, “I can’t keep doing that.”

In the meantime, he appreciated the faith showed in him by Boone, who has said he intends to keep Betances in the eighth-inning role.

“When the guy in charge says that, it means a lot,” Betances said. “I got myself in a big jam here and he left me out there. That means even more.”

On Friday, the confidence was rewarded.