With one out and a runner on first, D-backs outfielder A.J. Pollock hit a grounder to third, and it was a bang-bang play at first base.
First-base umpire Mike DiMuro ruled that Pollock was out, so Gibson went out and challenged the call.
"From where I was I thought he was safe," Gibson said. "We needed something."
Upon review, the call was overturned and Pollock was ruled safe, which meant that Gibson maintained his challenge.
Unfortunately for the D-backs, the call did not make a difference in the inning as pinch-hitter Eric Chavez and Gerardo Parra were subsequently retired to end the frame without a run scoring.
Gibson's only other challenge this year came on April 10 when Arizona outfielder Tony Campana was called out at second base on a first-inning steal attempt by second-base umpire Jim Reynolds. Gibson challenged the play, and after review the umpires ruled that the play would stand as called, meaning there was not conclusive evidence to overturn the original call.
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.