Complex sentence: The Dodgers then won the series and the pennant with another close victory in Game 2; they came back from a three-run deficit to tie the game in the ninth and then ultimately defeated the Braves, 6--5, in extra innings.
Split into simpler sentences: The Dodgers then took the series and the pennant with another close victory in Game 2. They came back from a three-run deficit to tie the game in the ninth and then ultimately toppled the Braves 6--5 in extra innings.