Jake Peavy’s early work this spring is centered on fastball command and little else.

The White Sox starter couldn’t be happier that’s where his focus lies after all of the health issues he faced in his first 2 1/2 seasons on the South Side.

Peavy made his first start on Sunday and got hit pretty well -- three earned runs and five hits in three innings -- but it’s not because his stuff lacks.

It had more to do with an aggressive approach by San Diego Padres hitters, who swung at nine of 15 first pitches they saw from Peavy, who threw mostly fastballs in a 44-pitch outing.

“This is the first time I’m free from that,” Peavy said. “It’s not in the back of my head. You have no idea what the future holds -- I may go out tomorrow and my elbow could blow up, that’s the risk we all take. But I think the numbers velocity wise today proves that to a lot of guys around camp. I had a little bit more than I had at any point all of last year. That’s a nice sign for me and something to build on, and you have to keep getting stronger.”

Peavy’s fastball sat between 89-93 mph throughout his three innings, according to one scout who noted the right-hander’s stuff was “much better than results.” One White Sox coach even counted a few 94-mph fastballs, a number Peavy didn’t come close to reaching in spring last season.

White Sox manager Robin Ventura said the way Peavy -- who signed a two-year, $29-million extension this offseason -- has thrown has given the coaching staff confidence he’s healthy.

“He hasn’t been tentative at all,” Ventura said. “He knows how to work and get his pitches in, but just as far as health-wise this year is a lot different for him coming in and doing his work. I don’t look at it as though we have questions either of health. Whatever happened today was more of him getting his work in and getting out there. That was the best part today was he got out there and got it started.”