So, he rode his bike.
The Miami area was jam-packed because of the ING Miami Marathon and Half Marathon, which drew a combined 25,000 registered runners. Several road closures made traffic a headache, specifically around the arena.
Peter Lee, on Twitter @peter1lee, snapped the above picture of James riding his bicycle to the game.
LeBron (or, as his bike reads, "King James") proceeded to score 35 points, leading Miami past the Eastern Conference-leading Bulls.
Miami improved to 15-5 on the season, while Chicago fell to 17-5.
*Correction: Photo credit fixed.*