Kiermaier's bunt down the first-base line forced Orioles starting pitcher Chris Tillman to race off the mound to make a play. Tillman picked up the ball and flipped it over to Chris Davis at first base.
First-base umpire Jim Wolf called Kiermaier out, but after review, the play was overturned and Tampa Bay had a runner on first with one out. Kiermaier was stranded at third when James Loney popped out to end the inning.
Rays manager Joe Maddon is now 9-for-27 in challenging plays this season.
The Orioles challenged a play in the bottom of the frame when Rays pitcher Juan Carlos Oviedo picked off Manny Machado.
Machado drew a two-out walk after Nick Hundley homered earlier in the frame to make it 2-1, and Oviedo picked him off with Adam Jones up. First-base coach Wayne Kirby, Machado and manager Buck Showalter protested to Wolf before the skipper challenged the call. The out call stood after review, ending the inning.
David Wilson is an associate reporter for MLB.com. Jeff Seidel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.