Initially, first-base umpire Ed Hickox ruled that Steve Pearce's foot came off first base, resulting in a safe call. Showalter immediately challenged. After 25 seconds, the call was overturned, and O's starting pitcher Miguel Gonzalez went on to have a 1-2-3 inning.
Showalter is 14-for-28 on challenges this season.
David Wilson is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.