I subscribe to mlb.tv premium, and as part of that subscription I can go back and watch any game.
I just went back and cued up to the play you describe.
Martes, the player on first, WAS running to second base...looked like an attempt at the Hit and Run strategy...but the shortstop did indeed catch the ball and tag the runner, like hole_n_one said.
I did the same. I posted a picture of the play above.