Complex sentence: The 86 points that were scored by the Heat were the fewest points that they had scored in a home game all season while the 21 point margin of defeat represented the Heat's largest home loss (regular season and postseason) in the Big 3 Era.
Split into simpler sentences: The 86 points scored by the Heat were the fewest points that they had scored in a home game all season. The 21 point margin of defeat represented the Heat's largest home loss (regular season and postseason) in the Big 3 Era.