Gibson said last week in New York that after Prado played four positions in two days, he wanted to settle on a position for him.
However, Prado started at third Saturday, second Sunday and in left field Monday.
By playing Prado in left rather than third Monday, Gibson was able to get Eric Chavez's bat into the lineup at third.
"I don't want to do it," Gibson said. "We need more offense, so that's just the way it worked out. Ideally I don't have to do it. What I said initially, I said if you need to do it, he can take it. I do believe there's more stability, I think, if you leave them in one spot more often. He's not a utility guy."
Prado is off to a slow start offensively, hitting .241, but Gibson does not believe that has anything to do with shuffling him around.
"He's fine; he just loves to play," Gibson said. "Prado is one of those guys that when things don't go well he works harder; he wants a bigger challenge."
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.