The 19-year-old Harper added to his already growing list of accomplishments with his daring dash.
Harper came up with two outs in the first and Philadelphia lefty Cole Hamels plunked him in the small of the back. Harper quickly shrugged off the sting, going from first to third on Jayson Werth's single to left.
When Hamels made a pickoff throw to first, Harper broke for home and slid in under the tag.
It was Harper's first stolen base in his eight-game major league career.