Complex sentence: The Los Angeles Kings historically have not fared well in the playoffs, despite there some highlights in franchise history such as the Miracle on Manchester in 1982 and against the defending Cup holders in 1989, upsetting the heavily favored Edmonton Oilers both times.
Split into simpler sentences: The Los Angeles Kings historically have not fared well in the playoffs. There were some highlights in franchise history, such as the Miracle on Manchester in 1982 and against the defending Cup holders in 1989, where they upset the heavily favored Edmonton Oilers both times.