Well, here's what happened according to the report in the newspaper:
With runners on first and second, [batter] hit a ground ball to third baseman who fielded it cleanly and tagged third base for the second out of the inning. [3B] threw the ball across the diamond in search of an inning-ending double play and while the throw took first baseman slightly up the line, he was still in position to make the tag. Upon applying the tag, however, [1B] collision with [batter] knocked his glove off the the ball went flying toward second base. The dislodged ball made [batter] safe.