Isaiah Jamar Thomas (born February 7, 1989) is an American professional basketball player for the Boston Celtics of the National Basketball Association (NBA). The 5-foot-9-inch (1.75 m) point guard played three years of college basketball for the Washington Huskies and was a three-time all-conference selection in the Pac-10. After electing to forego his senior year in college, Thomas was selected by the Sacramento Kings with the final pick in the 2011 NBA draft. In 2016, he was named an NBA All-Star for the first time. On February 19, 2015, Thomas was traded to the Boston Celtics in exchange for Marcus Thornton and a 2016 first-round pick.Three days later, he made his debut for the Celtics as he recorded 21 points and 5 rebounds off the bench in a 111-118 overtime loss to the Los Angeles Lakers. On March 2, he was named the Eastern Conference Player of the Week for games played February 23 through March 1. On March 25, Thomas returned after missing eight games with a bruised lower back to score just four points in 20 minutes of action in an 86-93 loss to the Miami Heat. On April 8, he scored a season-high 34 points in a 113-103 win over the Detroit Pistons. This performance helped him earn Eastern Conference Player of the Week honors for a second time on April 13, for games played April 6 through April 12.
In his first career playoff game on April 19, Thomas recorded 22 points, 10 assists and 5 rebounds in a first-round Game 1 loss to the Cleveland Cavaliers. The next day, he was named the runner-up for the 2015 Sixth Man of the Year Award. In the Celtics four-game first round playoff loss to the Cleveland Cavaliers, Thomas averaged 17.5 points, seven assists and three rebounds per game. On October 28, 2015, Thomas scored a game-high 27 points off the bench in the Celtics' season opening win over the Philadelphia 76ers. On December 16, 2015, he tied his career-high of 38 points in a loss to the Detroit Pistons. On January 28, 2016, he was named an Eastern Conference All-Star reserve for the 2016 NBA All-Star Game. Thomas became the lowest draft pick to be named an All-Star since the NBA draft was reduced to two rounds in 1989. He was just the ninth player who was under 6 feet (1.8 m) to be named an All-Star, while also tying Calvin Murphy as the shortest player to be selected for the All-Star Game. On February 8, he was named Eastern Conference Player of the Week for games played Monday, February 1 through Sunday, February 7. Thomas led the Celtics to a 4–0 week, including a road victory against the Eastern Conference-leading Cleveland Cavaliers. He averaged 20.3 points (12th in the East), 7.0 assists (tied for fourth in the conference) and 4.5 rebounds in those four games.
