The Boston Celtics have exercised its third-year option on forward Kelly Olynyk, and its fourth-year options on forward Jared Sullinger and center/forward Tyler Zeller. 

Olynyk appeared in seven games for the Celtics this preseason and averaged 8.6 points, 5.9 rebounds, 2.3 assists and 1.3 blocks in 25.2 minutes per game. He is averaging 8.7 points and 5.2 rebounds in 20.0 minutes per game through 70 career contests.  

Sullinger appeared in eight preseason matchups for the team and averaged 14.9 points, including shooting 15-30 (.500) from beyond the arc, 10.9 rebounds, 2.8 assists and 1.4 steals in 21.9 minutes per game over that span.  

Zeller appeared in eight preseason games for the Celtics and averaged 7.9 points and 4.6 rebounds in 18.8 minutes per game off the bench. He is averaging 6.9 points, 4.9 rebounds, 0.9 assists and 0.7 blocks in 21.0 minutes per game on his career.