Belt owns a five-game hitting streak in day games, batting .368 (7-for-19) in that span.
"As soon as I started figuring things out, my production got better," he said.
Belt wasn't certain how the day-night differences developed in the first place.
"I don't think there's anything you can do, except get some sleep," he said, joking. "It might be a matter of doing something a little different to make sure my body is awake and ready for the game."
Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.