GLENDALE, Ariz. - When it comes to Jack Perkins' Spring Training, Athletics manager Mark Kotsay isn't talking about a new pitch or some mechanical tweak. What’s really catching his eye is Perkins’ physical transformation.
“He’s lighter, yet stronger,” Kotsay noted before the A’s faced an 11-2 setback against the White Sox in their Cactus League opener. “He took the offseason message to heart, focusing on fitness and muscle gain.
He looks fantastic. We’re eager to see him on the mound.”
Perkins, like many MLB players, returned from the offseason looking leaner. But this isn’t just another “best shape of my life” story. Perkins took a scientific approach to reach peak condition.
After rehabbing a right shoulder strain that ended his season last August, Perkins delved into understanding his body’s needs to stay healthy-a challenge he’s faced over the past couple of years due to injuries.
Through extensive medical tests, including GI and toxin assessments, and a thorough genetic evaluation, Perkins crafted a regimen aimed at enhancing his health and recovery speed.
"We explored supplements and dietary adjustments to optimize my body,” said Perkins, who started for the A’s on Saturday at Camelback Ranch. “We uncovered a lot of beneficial insights.
I’m recovering better than I have in the last decade. It’s all about discipline.”
Maintaining discipline, particularly with diet, required sacrifices. For Perkins, the hardest was giving up sugar-especially Mr. Pibb, his go-to soda with meals back home in Indiana.
"You try alternatives like sparkling water,” Perkins joked. “But it’s not quite the same.”
Resisting Mr. Pibb paid off, as Perkins shed about eight pounds from his 6-foot-1 frame. More significantly, he noticed improved recovery from his rigorous offseason workouts.
"Cutting sugar reduces inflammation,” Perkins explained. “It helps my body target inflammation in areas like shoulders and legs after outings for full recovery.
I haven’t experienced this before. I’m really excited.”
Given his injury history, the A’s are considering Perkins’ role for 2026. Last season, he debuted as a top prospect, excelling as a reliever with three saves before impressing in four starts. He recorded a 4.19 ERA in 12 games, striking out 37 over 38 2/3 innings.
"The goal is to get him out there as much as possible,” Kotsay said. "We’ll build his pitch count over the first three outings, then decide his role.”
With his new routine, Perkins is confident he can become a top-tier starter, just as he did in the minors. Yet, the idea of transitioning to the bullpen, similar to Mason Miller’s path from future ace to All-Star closer, is also appealing.
"Last season, I proved I can do both,” Perkins said. “I believe I can be a great starter and a great reliever in this league.”