The good news for the Yankees on Sunday afternoon was that Carlos Rodon’s fastball had some good life to it.

The bad news was that Willie Calhoun found that out firsthand when one of them ran in and hit him on his left biceps near his elbow during a live batting-practice session at Yankee Stadium.

Calhoun immediately dropped his bat and was in obvious pain, walking around for a few seconds before he left the field with a trainer.

Suddenly, the Yankees’ leadoff hitter and starting right fielder for the series finale against the Red Sox looked to be in danger of not being able to play a few hours later.

But after a visit to the trainer’s room, Calhoun reappeared in the clubhouse and declared himself good to go, an injury crisis seemingly avoided.

“It just hit my nerve in my biceps, so I kind of had the same feeling as when I broke my arm,” Calhoun said, referring to a 2021 game while he was with the Rangers when he was hit by a pitch that broke his forearm and cost him nearly three months. “So I was like, ‘Not again.’ But everything’s good, I’m 100 percent.”

Calhoun said Rodon’s fastball left his arm feeling “completely numb” for a few minutes. But it eventually wore off and the only damage was “just a little swelling,” though not enough to keep him out of the lineup Sunday night.

The Yankees, who are already playing without injured outfielders Aaron Judge and Harrison Bader, certainly needed Calhoun to be OK. After he hit a go-ahead home run Saturday in a 3-1 win over the Red Sox, he entered Sunday batting .310 with a .927 OPS over his last 12 games.

Calhoun has long had the potential to be this kind of an impact hitter, but the early part of his big-league career was derailed by injuries — including two from being hit by pitches. In addition to the broken forearm, Calhoun took a 95 mph fastball to the jaw during spring training in 2020, which took a toll on him both physically and mentally.

“Scary moment,” manager Aaron Boone said of the friendly fire on Sunday. “Obviously he’s had a couple serious hit-by-pitches in his career, so I think it scared him as much as anything. Looks like it got him in a good spot, so I think we’re OK.”

During Rodon’s first live session on Wednesday, the left-hander faced left-handed hitter Jake Bauers and switch-hitter Oswaldo Cabrera before the game that night was postponed by unhealthy air quality. On Sunday, he faced the rehabbing Bader and Calhoun, in part because the Yankees did not have any left-handed hitters who were on the bench for the game against the Red Sox.

But Calhoun’s appearance was short-lived. The plunking came on his first at-bat against Rodon and immediately had him flashing him back to his past injuries.

“I know ’Los didn’t mean it. It’s just a pitch that got away from him,” Calhoun said. “But yeah, I broke my arm the same exact way. So when my arm went numb, I was like, ‘Not again.’ It just hit my nerve so that’s why my arm kind of went tingly and numb. But other than that, I’m good.”

Rodon, clearly concerned for his teammate, walked in from the mound to check on Calhoun before he continued his session. After he finished his outing, Rodon walked through the clubhouse and went straight to the trainer’s room to check on Calhoun, which seemed to ease his mind.

“Yeah, not what we’re looking for when you’re facing your own team,” Rodon said. “Fastball ran in. I’m hoping he’s OK. I just hope he’s able to play and this doesn’t affect him.”

Boone also talked to Rodon in between his two simulated innings of work, trying to make sure the lefty kept his focus after the unfortunate mishap.

“But that’s hard,” Boone said. “It’s weird enough going up against teammates in a live session, then you hit one. So it’s a tough spot to be in. … In the end, it’s baseball. Things happen in the game that you try to avoid, but we’re playing a sport. It looks like we were able to avoid anything.”