Where there are runners at first and second and the batter grounds into a double play. The runner on first is forced out, as is the batter, but the runner on second moves over to third.
Hence, a sacrifice double play.
Also known as a San Francisco sacrifice.
With Schierholtz on first and Sandoval on second, Aubrey "Audrey" Huff hits a weak ground ball to second for a 4-6-3 double play.
Sandoval goes to third. A sacrifice double play. A San Francisco sacrifice.