Sullinger reported that he had felt some discomfort in his foot after Boston's win against the Atlanta Hawks on Feb. 11. The injury was first discovered during tests conducted after the 22-year-old took himself out of a practice session ahead of the team's loss to the Sacramento Kings on Friday.
"Supposedly it happened in the Atlanta game, and he was talking a little bit about it [Wednesday] with regard to feeling some discomfort, and so he went through a little bit of practice then pulled himself out," Celtics coach Brad Stevens said. "[Trainer Ed Lacerte] took him to get the X-ray [Thursday]."
The 6-foot-9 forward was seen with a boot on his left foot after leaving practice. At that time, Sullinger said he did not think surgery would be necessary.
After returning to Boston on Saturday and confirming the fracture, Boston decided to end his season.
In his three career seasons, all with Boston, Sullinger has averaged 11.7 points, 7.5 rebounds and 44.3 percent shooting in 25.9 minutes per game. His rookie season was cut short by a back injury that sidelined him after 45 games.
This season, he had recorded 14.4 points and 8.1 rebounds per game, starting in 49 of his 51 appearances.
The Celtics are 20-32 overall and 12-19 in the Eastern Conference. Boston is currently in 12th place in the East, 1.5 games out of eighth place. The team will play the Lakers in Los Angeles on Sunday night at 9:30 p.m. ET.
- Christopher Woody