First-base umpire Bob Davidson called LaRoche safe at first and Gibson challenged the call.
After a brief review, the call was overturned and LaRoche was called out to end the inning.
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.