The Celtics signed guard Marcus Smart to a four-year, $77.1 million extension on Monday, according to The Athletic's Shams Charania.
Smart's extension will begin in the 2022-23 season. He will earn $14.3 million in 2021-22.
Smart, 27, has played each of his seven NBA seasons with Boston after being selected with the No. 6 pick in the 2014 NBA draft. The Oklahoma State product averaged a career-high 13.1 points and 5.7 assists per game last season, though he shot just 39.8 percent from the field. Smart is a two-time All-Defense selection.
Boston enters 2021-22 seeking its eighth straight playoff appearance, though the franchise has not reached the Finals since 2010.