Most wins in a month: The Heat went 17-1 in March 2013, becoming the first team to win 17 games in a single calendar month in NBA history.
Overtime in Postseason: The HEAT’s 103-100 overtime win vs. SA on June 18, 2013 improved their all-time postseason overtime record to 8-1 (.889). Their .889 postseason winning percentage is the best among teams with at least three overtime games played and the second-highest among all teams. 
DOUBLE-DIGIT wins in Postseason: The HEAT’s 16-point, 109-93, win in Game Four of the NBA Finals at SA on June 13, 2013 was Miami’s 12th double-figure win in the 2013 postseason. The 12 double-digit wins are tied for the most by any team during a single postseason in NBA history. The San Antonio Spurs tied this record in the 2014 post season. The previous record was 11, held by five different teams, each winning the NBA Championship that postseason. 
Highest Field Goal Made Percentage, post season: Chris "Birdman" Andersen shot 80.7 percent (46-of-57) from the field in the 2013 postseason. He has become the first player in NBA postseason history to take at least 35 shots and shoot better than 75 percent from the field.
SIX AND SEVEN over 30 points: LeBron James scored 32 points in Game Six of the NBA Finals on June 18, 2013 and then made 37 points in Game Seven on June 20, 2013. According to Elias Sports Bureau, he became the first player in NBA history to score consecutive 30-point games to help rally his team from a 3-2 series deficit to win an NBA title. 
GAME SEVEN over 30 Points: LeBron James finished the 2013 postseason by recording his fourth-straight 30-point Game Seven by scoring 37 points vs. SA in the NBA Finals. He had previously scored 32 points vs. IND on June 3, 2013, 31 points vs. BOS on June 9, 2012 and 45 points at BOS on May 18, 2008. The Elias Sports Bureau reports he has tied the record of the only other player to score at least 30 points in four consecutive Game Seven’s, Elgin Baylor (33 at STL on 3/26/60, 39 at STL on 4/1/61, 41 at BOS on 4/18/62, 35 vs. STL on 4/11/63 & 33 vs. STL on 4/15/66). 
Highest Scoring average in game sevens: Lebron James is averaging 34.4 points in Game Seven’s of the postseason during his career, currently the best average in NBA history. 
Most 3 point FG in Postseason: Ray Allen owns the record for most 3 point field goals in the postseason - 352. 
Most 4 point plays in a Finals game, 2: On June 16, 2013, Ray Allen converted two free throws after making three point field goals, one at the 5:08 mark in the 2nd quarter, and the other with 8:37 left in the 4th quarter. There had previously been only 12 four point plays in the NBA Finals history. 
Team Leader in Points, Rebounds, and Assists: LeBron James’ 18 points, 18 rebounds and 10 assists vs. SA on June 6, 2013 was the 28th time he has led his team outright (no ties) in each of those categories during the playoffs, the most in NBA postseason history. In addition, he has been the outright game-high leader (no ties) in each of those categories eight times, also the most in NBA postseason history. His eight such games are more than the combined total of the next three players to achieve the feat. 
25-10-8: LeBron James’ 32 points, 10 rebounds and 11 assists vs. SA on June 18, 2013 marked his 15th postseason 25-point, 10-rebound, eight-assist game,the most in NBA postseason history. According to Elias, second on this list is Oscar Robertson with 10 such games. 
BACK-TO-BACKS: The HEAT recorded a 15-1 record (.938) on the second night of a back-to-back set in the 2012-13 season, tying for the best record on the second night of a back-to back set in NBA history. The Dallas Mavericks also finished 15-1 (.938) in such games during the 2006-07 season.