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Alan Diaz, Associated Press
Gabrielle Union watches pre-game practice before an NBA basketball game between the Miami Heat and the Charlotte Bobcats in Miami, Sunday, Jan. 1, 2012.

MIAMI — Chris Bosh scored 20 of his 24 points in the first half, and the Miami Heat improved to 5-0 for the first time in franchise history by rolling past the Charlotte Bobcats 129-90 on Sunday night.

The 129 points is the most scored by any NBA team so far this season and the 39-point victory margin matched the third-largest in Heat history. Dwyane Wade scored 22 points and LeBron James and Mario Chalmers each scored 16 for the Heat, who ran out to an 18-point lead after one quarter and never trailed.

DJ White scored 21 points and Kemba Walker finished with 17 for Charlotte, which lost its seventh straight regular-season meeting against Miami.