Hahn, who makes his season debut with a start against the Rangers on Tuesday, didn't skimp on breakfast, either, consuming enough eggs and bacon for a party of four. Chicken or steak highlighted dinner, depending on the day, and he snacked often, too. All because of a season-ending directive from the Padres to pack on the pounds, before they shipped him to Oakland in the Derek Norris deal.
So Hahn, an avid runner, didn't run once. Instead he used that time to lift more. And eat.
The belief in San Diego was that added weight could be beneficial to Hahn's late-inning work. Often last season, even as he was pitching his way to a 7-4 record and 3.07 ERA, he'd lose velocity as the game progressed. In between starts he struggled through the recovery process.
What a difference 15 pounds makes.
"I can already tell," said Hahn, who now hits the scale at 215. "I noticed in the beginning of spring, when I came back and started throwing, my mechanics were a little out of whack, but it was because I was probably trying to find that new balance point. Halfway through spring is when I figured it all out, and now I feel great.
"I don't feel as sore after either. I think, last year, I used a lot more lower body weight and core, and that was the hardest thing for me, recovering from start to start. I was hoping to improve on that this year, and I already feel stronger."
Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.