Los Angeles (AFP) - LeBron James and the Cleveland Cavaliers looked every inch the reigning National Basketball Association champions on Wednesday, opening the pre-season with a 117-102 victory over the Orlando Magic.

The Cavaliers led by as many as 31 points, even with Kyrie Irving taking a night off, the Cavaliers preferring to rest their star guard for the exhibition after his exertions in helping the United States to Olympic gold in Rio de Janeiro.

"Playing, winning the championship and then playing this summer in Brazil, winning the gold medal, we just thought (it was) a lot of wear and tear on his body, especially in the playoffs when he was playing probably 38 or 39 minutes per game," coach Tyronn Lue said.

"For the pre-season, we just want to let him get his legs under him, bring him along slowly and pick it up as the season progresses, but we don't want to wear him out, get him to the point where his body is aching or different situations where something is tweaked."

James, coming off his third NBA Finals Most Valuable Player Award after leading the Cavs over the Golden State Warriors in last season's championship series, scored seven points on three-of-four shooting with six assists in 13 minutes on the floor.

"It was fun to get back out there," James said.

Kevin Love added eight points and four rebounds in 13 minutes.

Cavs reserve Jordan McRae led all players with 20 points, seven rebounds in five assists in 24 minutes on court.

The Cavaliers will launch their title defence on October 25, when they host the New York Knicks on the opening night of the regular season.