The key? Staying relaxed at the plate.
"It simplifies everything," Span said. "It slows things down."
Manager Matt Williams has noticed that the speedy center fielder is seeing the ball particularly well.
"He's letting it get a little deeper, letting it travel a little bit more … the results kind of tell you that," Williams said. "If he's able to stay on a breaking ball and hit it to right, it means he's on the ball. Or if he's able to take a fastball the other way, he's letting it travel and get deeper."
Daniel Popper is an associate reporter for MLB.com. He also can be found on Twitter @danielrpopper. This story was not subject to the approval of Major League Baseball or its clubs.