Gone are the swings a tick too slow, the confounding strikeouts, the weak ground balls to the left side. In the first three games since Ryan Zimmerman received a cortisone shot in the AC joint of his right shoulder, he was 6 for 13 with two doubles and a home run. Tuesday night, in the process of notching his 1,000th career hit, Zimmerman had his first three-hit game since May 19, a span of 30 games and 128 plate appearances. It's almost as if a switch was flipped the minute the Washington Nationals' team doctors administered the corticosteroid directly to the spot that had been hampering Zimmerman for several weeks.