Wil Myers grounded to second baseman Danny Valencia, whose throw to first arrived in Eric Hosmer's glove just as Myers reached the bag. First-base umpire Quinn Wolcott called Myers out for the final out of the inning.
After the Royals returned to the dugout, Maddon challenged the call.
"I challenged it," Maddon said. "We had a challenge in our pocket. Why not?"
A review of the replay took place, and the umpires ruled that the play would stand.
"I knew it was close," Myers said. "Obviously, I would say I was safe, because I was the runner. It was a close play, but they got it right."
The review took one minute and five seconds.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.