SCOTTSDALE, Ariz. — If you’re a Yankees fan and you’re wondering how your future first baseman is doing, Greg Bird is alive and well, rehabilitating his career in the Arizona Fall League.

In his first games since undergoing the right-shoulder surgery that sabotaged his entire 2016 season, Bird has been taking his frustrations out on prospect pitchers in the desert for the past couple of days.

In his first game playing for the Scottsdale Scorpions, Bird went 1-for-4 with an RBI double and a walk Tuesday night. Then on Wednesday, he went 2-for-4 with two doubles, an RBI and a run scored.

Having already done a brief stint with the Yankees in 2015, when he had 11 home runs and 31 RBIs in 46 games, Bird is a bit of an anomaly in the Fall League, where the rosters are made up mostly of minor league prospects without big league experience.

That doesn’t faze Bird in the least, though, because he’s back to doing what he loves after enduring a traumatic 2016 season with no baseball.

He went from being Mark Teixeira’s heir apparent at first base to being shelved for the season. It was all too much for him to stomach and, even though those were his closest friends and teammates playing for the Yankees in 2016, it got to the point at which he couldn’t bear to watch anymore.

So a wrestling match within his psyche ensued.

“You want to get away from it, but you don’t want to get away from it,’’ Bird told The Post. “I started out watching games quite a bit, but I stopped pretty quickly. It was not that I didn’t care. It was just hard to watch, so I kind of stopped watching for a while. I tried to get away from it a little bit, but that was tough.’’

The 23-year-old Bird called rehabbing the shoulder injury “physically challenging, but mentally was the more challenging part.’’

“I mean, when was the last time I took a summer off from baseball?’’ he said. “That was hard for me, just not being around it. That was an adjustment. It was kind of hard seeing light at the end of the tunnel sometimes.’’

There is light again for Bird now. Teixeira unexpectedly announced his retirement during the season, so first base is even more wide open for a healthy Bird than ever. He will be competing with Tyler Austin and perhaps a veteran, should the Yankees add one this offseason.

“Me and Tex have a good relationship,’’ Bird said. “I’m sad to see him go, because I like watching him and I like learning from him. But I’m glad that he’s happy about it.’’

When it was pointed out to him that the “decks are clear’’ for him at first now that Teixeira has retired, Bird said, “The first thing that comes to mind is work. We’re not even close to where we want to be. We want to be playing this time of year, and not in the Arizona Fall League.’’

Music to the ears of the Yankees’ brass.

“I was jacked up going into [2016], just getting a taste of it last year [2015] with a little playoff push at the end,’’ Bird said. “That’s what you work for your whole professional career and your whole life really. So it was just hard, disappointing to get hurt with the timing it happened — right before the season [in February]. I never got to get going. That was hard. But I’m excited now. We’ve got a great thing going in New York now.’’

This, too, is part of what pained Bird not being able to play last year, watching the likes of Gary Sanchez and Aaron Judge — fellow prospects he has grown with through the system — prosper and not being able to share that.

Like everyone else, Bird reveled in the amazing run Sanchez went on at the end of the season, calling it “unbelievable.’’

“I mean, I don’t know if there’s another word that you can use,’’ he said. “It was so much fun to watch all those guys grow up. I wanted to be there with them. That was hard, too, not to be there with them. I’ve just got to be patient. Patience is rewarding in this game. That was another lesson in patience.’’

So Bird’s patience is taking place far away from the ongoing playoffs, something he hopes to be taking part in a year from now. That would be the ultimate reward for his nightmarish 2016.