Ben Zobrist swung at strike three for the first out of the inning, and Orioles catcher Matt Wieters threw to second base to nail Kelly Johnson trying to steal for the second out.
Asked if he saw the video replay, Maddon said: "I did. I think I was right. I thought his foot got in there. And I thought it was in there from the dugout. And I thought I had a legitimate beef right there."
For his conversation with Knight, Maddon received his 28th career ejection.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.