In the bottom of the 1st inning, with runners on first base and third base, San Francisco Giants' catcher Buster Posey was at-bat with one out. He was looking to give the Giants an early lead against Philadelphia Phillies ace Roy Halliday.
In this situation, the one thing that Posey does not want to do is hit a ground ball. A ground ball at the Major League level in more than likely a double play. And with one out in the inning, the Phillies would be out of the inning with no runs allowed and no damage done.
Buster Posey hit a ground ball to Phillies' second baseman Chase Utley. It wasn't hit very hard, but hard enough that a Major League second baseman should be able to turn a double play.
No matter at what level or in which sport you are playing, coaches always preach the same thing - make sure you catch the ball first.
Because the ball wasn't hit all that hard, Giants' second baseman and base runner Freddy Sanchez did the correct thing by running back towards first base - you never want to run into an out, which would have happened.
So Utley, before the ball was secured in his glove, started to run at Sanchez. But the baseball continued to lay on the ground.
Utley would then retrieve the ball and throw it to second base for a force out. But the runner from third base had scored and given the Giants and 1-0 early lead.
Always put first things first, and in athletics, it usually means catch the ball before you make a move.