six-year, $78,000,000 contract extension with the Nets. Jefferson missed the majority of the 2004–05 regular season after rupturing a ligament in his left wrist, an injury he claimed occurred when Detroit Pistons guard Chauncey Billups purposely undercut him on a layup attempt during a game on December 27, 2004. Jefferson ended up missing 49 games, but returned to action for the first round of the playoffs against the Miami Heat. Prior to suffering the injury, he had missed only five games in his three NBA seasons. Jefferson had been enjoying his best professional season, averaging 22.2 points, 7.3 rebounds, and 4.0 assists per game. Through the 2005–06 season, Jefferson continued to perform at a high level and established himself as one of the NBA's most versatile players. On January 21, 2007, Jefferson decided to have ankle surgery. After missing around six weeks, he was back in the lineup. His absence proved to be a major setback for the struggling Nets, who surged back into playoff contention once Jefferson returned. In August 2007, Jefferson pledged $3.5 million toward the University of Arizona's then-planned basketball and volleyball practice facility, which was eventually named in his honor. Jefferson started the 2007–08 season in the best form of his NBA career. In the first 7 games, he averaged 26.9 points, 5.6 rebounds and 2.4 assists, while also notching up 1.3 steals, 97.1% in free-throws and 49.1% in field-goals. On October 31, in a game against the Chicago Bulls, Jefferson injured his right wrist slightly, thumping his chest following a clutch three-pointer. The Nets went on to win the game in overtime. On December 4 he passed Kerry Kittles to become the Nets' second all-time leading scorer. Milwaukee Bucks (2008–2009) On June 26, 2008, Jefferson was traded to the Milwaukee Bucks for Yi Jianlian and future teammate Bobby Simmons. He was not happy with the trade at first because he planned on being a Net until retirement. However, he later expressed enthusiasm about playing alongside Michael Redd. San Antonio Spurs (2009–2011) On June 23, 2009, Richard Jefferson was traded to the San Antonio Spurs for Bruce Bowen, Kurt Thomas, and Fabricio Oberto. On June 30, 2010 Jefferson opted out of his contract with San Antonio and became an unrestricted free agent. On July 23, 2010, Jefferson re-signed with the Spurs. Golden State Warriors (2012–2013) On March 15, 2012, the Golden State Warriors traded the newly