who covers second base on a pick off
Covering a base When a runner on first base attempts to steal second base, the shortstop and second baseman will have arranged in advance which one will cover second base to receive the ball from the catcher. Likewise, when the pitcher attempts to pick off a runner at second base, the shortstop and second baseman will have arranged in advance which one will cover second base.
Covering a base In general, the first baseman covers first base, the second baseman or shortstop covers second, the third baseman covers third, and the catcher covers home plate. However, on ground balls hit to the first baseman away from first base, the pitcher will cover first base instead. On a ground ball to either the shortstop or the second baseman, the other of those will cover second base.
Alonso Álvarez de Pineda
Stolen base A stolen base most often occurs when a baserunner advances to the next base while the pitcher is pitching the ball to home plate.