Butler was a lottery pick in the 2002 NBA draft, selected with the 10th overall pick by the rebuilding Miami Heat. Miami would rely on Butler immediately despite being a rookie, and he would start in all 78 games he played in during the season, averaging 15.4 points, 5.1 rebounds and finished 8th in the league in steals with 1.8 per game. Despite Miami winning just 25 games and missing the playoffs, Butler proved to be a notable rookie, winning the rookie of the month awards four times during the season while also getting selected to play in the rookie challenge game at that year's All-Star weekend in Atlanta. By season's end, Butler would also be named to the first team on the NBA All-Rookie Team. Miami would again enter the draft lottery, and this time drafted Dwyane Wade before acquiring Lamar Odom from the Los Angeles Clippers.