It was Game 3 of the 2001 ALDS.
The A's had a comfortable series lead over the Yankees, 2-0. New York led 1-0 in the seventh with two outs. Jeremy Giambi stood on first as Mike Mussina stared down off the mound at A's lefty Terrence Long. T-Long ripped a fastball down the right-field line and the not-so-speedy Giambi rounded third.
Yanks right fielder Shane Spencer picked up the ball and fired toward the plate, overthrowing his cut-off man by a long shot. The ball bounced slowly towards Jorge Posada, who was waiting for it at home. The ball was slowing down and there was no way it was going to make it to the plate in time to get the runner, when, all of a sudden, Derek Jeter appeared out of thin air, grabbed the ball and, while running full speed in the opposite direction, flipped the ball to Jorge Posada. Posada caught the ball and tagged Giambi (who, for some reason, decided not to slide) on the back of the leg just as he crossed home plate.
Giambi was called out and the A's lost the game and eventually the series. Every time I see this replay, I cannot help but ask myself two questions:
1. Why and how did Derek Jeter get to that ball?
2. Why didn't Jeremy Giambi slide?