Complex sentence: Fox led the Giants to the NL West title in 1971-losing to the eventual world champion Pittsburgh Pirates in the National League Championship Series-but the Giants made a series of bad trades and fell from contention thereafter.
Split into simpler sentences: Fox led the Giants to the NL West title in 1971, losing to the eventual world champion Pittsburgh Pirates in the National League Championship Series. Subsequently, the Giants made a series of bad trades and fell from contention thereafter.