team. On February 20, 2002, former Kentucky teammate Tony Delk was traded to the Celtics, reuniting Walker with him. Dallas Mavericks (2003–2004) Just 10 days before the start of the 2003–04 season, Walker was traded with Delk to the Dallas Mavericks for Raef LaFrentz, Chris Mills, and Jiří Welsch. Walker was used in a relatively limited capacity on his new team due to the number of high-caliber players populating the Mavericks' roster. Included on that team was Antawn Jamison, newly acquired from the Golden State Warriors. Atlanta Hawks (2004–2005) On August 8, 2004, Walker and Delk were traded again, this time to the Atlanta Hawks for Jason Terry, longtime Hawk Alan Henderson and a draft pick. Return to Boston (2005) On February 24, 2005, Walker was traded back to the Celtics in a deal that sent Gary Payton, Tom Gugliotta, Michael Stewart, and a first-round draft pick to the Hawks. (Payton was released by the Hawks and re-signed with Boston for the remainder of the season). Walker started all 24 remaining games for the Celtics, averaging 16.3 points and 8.3 rebounds a game as the Celtics advanced to the playoffs before losing to the Indiana Pacers in a 7-game first round series. For his second stint with the Celtics, Walker briefly chose to wear the uniform number 88, as his trademark 8 jersey was being worn by rookie Al Jefferson. Jefferson would switch to number 7 after 2 games. Miami Heat (2005–2007) On August 2, 2005, Walker was involved in a five-team, 13-player deal (the largest trade in NBA history) that sent him from the Celtics to the Miami Heat. The Celtics received Curtis Borchardt, Qyntel Woods, the draft rights of Albert Miralles, and draft picks in the deal. The move reunited Walker with Celtics teammate Gary Payton. The Heat played Walker mostly off the bench, and he rotated between both forward positions. Though he struggled early to adjust to this role, by the end of the season he was a force for the Heat, finishing the season with averages of 12.2 points and 5.1 rebounds a game as the team's main scorer off the bench. Walker also led the team in overall 3-point shots made for the season, and increased his 3-point, free throw and overall shooting percentages. In the playoffs his production would increase, as he would be the third leading scorer for the team while making crucial