Complex sentence: He struggled, scoring a lone goal during the regular season, but in the playoffs, in his only appearance, as a substitute in the MLS Cup Final, he scored the game-winner in extra time to give Galaxy its second MLS title.
Split into simpler sentences: He struggled, scoring a lone goal during the regular season. But in the playoffs, in his only appearance, as a substitute in the MLS Cup Final, he scored the game-winner in extra time to give Galaxy its second MLS title.