Seattle SuperSonics (2003–2008) Luke was picked 14th in the
2003 NBA draft by the Seattle SuperSonics. Ridnour played sparingly during his rookie season, but became the starting point guard for the Sonics in the 2004–05 season. He participated in the 2005 All-Star weekend, playing in the
Rookie Challenge and
Skills Challenge. During the
2005 NBA Playoffs, Ridnour and the Sonics reached the conference semifinals, where Ridnour averaged 10.8 points, 3.7 assists, and 3.3 rebounds as they were eliminated by the eventual champion
San Antonio Spurs in a six-game series. On November 13, 2006, Ridnour scored a career-high 32 points, including four made free throws to seal the victory, while leading Seattle to a 119–113 win over the
New Jersey Nets.
Milwaukee Bucks (2008–2010) On August 13, 2008, Ridnour was involved in a three-team, six-player deal involving the Sonics (which had become the
Oklahoma City Thunder), the
Milwaukee Bucks, and the
Cleveland Cavaliers, that sent Milwaukee's
Mo Williams to Cleveland, Cleveland's
Joe Smith and Milwaukee's
Desmond Mason to Seattle, Cleveland's
Damon Jones and Ridnour and
Adrian Griffin to Milwaukee, which ended Ridnour's five-year run with the Sonics/Thunder. On January 22, 2010, Ridnour scored a season-high 27 points during a 101–96 loss to the
Toronto Raptors.
Minnesota Timberwolves (2010–2013) On July 21, 2010, Ridnour signed a four-year, $16 million contract with the
Minnesota Timberwolves. On February 22, 2012, he scored a buzzer-beater with a floater against the Utah Jazz.
Return to Milwaukee (2013–2014) On July 11, 2013, Ridnour was reacquired by the Bucks in a three-team transaction that brought
Oklahoma City Thunder shooting guard
Kevin Martin to the
Minnesota Timberwolves.
Charlotte Bobcats (2014) On February 20, 2014, Ridnour was traded to Charlotte along with
Gary Neal in exchange for
Ramon Sessions and
Jeff Adrien.
Orlando Magic (2014–2015) On July 25, 2014, Ridnour signed with the Orlando Magic. His final NBA game was played on April 1, 2015, in a 91–103 loss to the
San Antonio Spurs, in which he recorded six points and one assist.
Retirement In June 2015, Ridnour garnered national attention as he was traded four times in six days. On June 24, he was traded to the
Memphis Grizzlies in exchange for the draft rights to
Jānis Timma. On June 25, the Grizzlies sent him to the
Charlotte Hornets in exchange for
Matt Barnes; later that same day, he was traded with a 2016 second-round draft pick, to the
Oklahoma City Thunder in exchange for
Jeremy Lamb. Lastly, on June 30, Ridnour was traded to the
Toronto Raptors along with cash considerations in exchange for the draft rights to
Tomislav Zubčić. Ridnour later stated in an interview with
USA Today that he found the whole situation rather "funny," as he and his family were at their home in Seattle while the moves were unfolding. On July 9, 2015, he was waived by the Raptors, adding to the list of teams he never visited during the two-week. On June 22, 2016, Ridnour announced his retirement from professional basketball. ==NBA career statistics==