Rajon Pierre Rondo (born February 22, 1986) is an American professional basketball player for the Cleveland Cavaliers of the National Basketball Association (NBA). Rondo played two years of college basketball for the Kentucky Wildcats before being drafted 21st overall by the Phoenix Suns in the 2006 NBA draft and subsequently traded to the Celtics in a draft-day trade. Rondo is a two-time NBA champion, four-time NBA All-Star, has earned four NBA All-Defensive Team honors including two First Team honors, and was named to the All-NBA Third Team in 2012.

During his time in Boston, Rondo helped the Celtics advance to the NBA Finals in 2008 and 2010, winning a championship in 2008 as the team's starting point guard. Rondo is known to be a versatile facilitator in the NBA, leading the league in assists three times and in steals once; he also ranks fourth in Celtics history in assists and third in steals. Rondo has sometimes been described as a "stat-sheet stuffer", ranking 13th in NBA history for triple-doubles with 32 in the regular season, and 10 in the playoffs.

After 8½ seasons with the Celtics, Rondo was traded to the Dallas Mavericks in December 2014. Following a tumultuous five-month stint he joined the Sacramento Kings in 2015 and then the Chicago Bulls in 2016, the New Orleans Pelicans in 2017 and the Los Angeles Lakers in 2018 with whom he won his second NBA title in 2020. After the season, Rondo joined the Atlanta Hawks, where he stayed for half a season before being traded to the Los Angeles Clippers for the remainder of the season. Rondo was traded to the Memphis Grizzlies during the 2021 offseason and agreed to contract buyout to become a free agent.