Complex sentence: The Mets won 100 games that season, taking the NL East by fifteen games, however the heavily favored Mets lost to the Los Angeles Dodgers in the 1988 National League Championship Series.
Split into simpler sentences: The Mets won 100 games that season, taking the NL East by fifteen games. However, the heavily favored Mets lost to the Los Angeles Dodgers in the 1988 National League Championship Series.