William Anthony Parker Jr. (born 17 May 1982) is a French-American former professional basketball player and majority owner of ASVEL Basket in LNB Pro A. Himself the son of a basketball pro, Parker started his career at Paris Basket Racing in the French basketball league before joining the San Antonio Spurs of the National Basketball Association (NBA). He was selected by the Spurs with the 28th overall pick in the 2001 NBA draft, and quickly became their starting point guard. Parker won four NBA championships (2003, 2005, 2007, and 2014), all of which were with the Spurs. He also played for ASVEL Basket in France during the 2011 NBA lockout, and finished his playing career after one season with the Charlotte Hornets. He retired as the ninth leading scorer and fifth leading passer in NBA playoffs history.

Parker was named to six NBA All-Star games, three All-NBA Second Teams, an All-NBA Third Team and was named MVP of the 2007 NBA Finals. He was also a member of the All-Rookie First Team and had his No. 9 retired by the Spurs. He is regarded as one of the greatest European players of all time.

While playing with the French national team, Parker was named the MVP of EuroBasket 2013, following his team’s victory over Lithuania in the final. He finished as the tournament’s top scorer, with an average of 19 points per game. In 2015, he became the all-time leading scorer in the EuroBasket competition, a record that was broken by Pau Gasol two years later.