Kyrie Irving, last season's Rookie of the Year, snapped out of his preseason shooting slump with 22 points for the Cavaliers (3-2), who came from behind after blowing a 14-point third-quarter lead.
Glen Davis scored 27 points to lead Orlando (0-3).
Irving shot just .239 (11 of 46) from the field in Cleveland's first four preseason games, but he scored nine straight to spark a 21-6 run that put the Cavaliers ahead 31-19 with 29.6 seconds left in the first half. He finished the first quarter with 11 points and the first half with 18, two more than his previous preseason single-game high of 16.
He finished an efficient 5 for 8 from the field and 11 for 11 on free throws.
After whipping the Warriors in Game 4, are the Thunder on the verge of completing an unprecedented run to the NBA Finals? Kevin Pelton has the spectacular facts.
How Oklahoma City took a commanding 3-1 series lead in the Western Conference finals with a dominant Game 4 win over Golden State.
The Warriors' chase of history is nearly history after a Game 4 loss to the Thunder, but their confidence remains intact.