Moustakas is hitting .354 in night games, topping Arizona's Paul Goldschmidt's .346.
Moustakas has no explanation.
"I didn't even know about it," he said. "But it's pretty cool. I guess it means I have good night vision."
After thinking about it for a moment, Moustakas then added, "You know, I've heard Miggy just crushes it during the day. That right?"
Indeed it is: Detroit's Miguel Cabrera leads all Major Leaguers with a .420 day-time batting average.
• Royals right-hander Kris Medlen will move from Double-A Northwest Arkansas to Triple-A Omaha for his next rehab start, which will be Monday. He will throw 75 pitches or so.
Jeffrey Flanagan is a reporter for MLB.com. Follow him on Twitter at @FlannyMLB. This story was not subject to the approval of Major League Baseball or its clubs.