After being looked at by D-backs head athletic trainer Ken Crenshaw, Wolf stayed in the game and finished the inning.
After the inning was completed however, Wolf left the game and was sent off for precautionary reasons by crew chief Brian O'Nora and replaced behind the plate by first-base umpire Alan Porter.
The umpires went with a three-man crew the rest of the game.
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.