Around 5:30 p.m., as stadium speakers cough to life, Gonzalez dunks himself into a hot tub for two minutes and then a cold tub for three minutes."At the beginning, when you get in the hot tub, it keeps the blood flowing – your body's keeping loose, your blood's boiling real rapidly, nice, smooth," he explains. "When you go in the cold tub, it just tightens up, everything just tightens up," which is good not because Gio is looking to pull something, but because the suddenness of the change forces his body to run a systems check. He exits the cold tub and dries off, letting his body get back to room temperature. "You want your body to feel like it's brand-new every time you get on that mound," he says. "It's the same routine, the same mind frame, but your body doesn't get used to it because you don't do the hot and cold on a daily basis. You only do it on the day you pitch."