Kevin Seraphin contributed 16 points and 10 rebounds for the Wizards, who overcame a triple-double of 26, 13 and 11 assists from LeBron James.
A.J. Price (14 points) Martell Webster (13 off the bench) also helped out for Washington, which improved to a league-worst 2-13 with the surprising victory -- their third straight over the Heat dating back to last season.
Miami saw its six-game win streak come to an end despite Dwyane Wade's 24 points and a double-double of 20 and 12 rebounds from Chris Bosh.
Notable deaths of 2014 [PHOTOS]