Complex sentence: In the postseason, he allowed just one earned run in innings pitched, helping the Yankees advance to and win the 1996 World Series against the Atlanta Braves; it was the franchise's first World Series championship since 1978.
Split into simpler sentences: In the postseason, he allowed just one earned run in innings pitched, helping the Yankees advance to and win the 1996 World Series against the Atlanta Braves. It was the franchise's first World Series championship since 1978.