This isn't going to help the Celtics this year, but Nenad Krstic technically has the option of returning to the NBA after next season (if there is a season).
Exclusive: Krstic has $1M buyout with CSKA Moscow
Contrary to prior reports, Nenad Krstic does have a buyout clause in his two-year contract with CSKA Moscow, and it’ll cost him $1 million to return to the NBA for the 2012-13 season. "Actually I have a one plus one," Krstic told SheridanHoops. "So after the first year I can go back to the NBA. It’s my option, the second year. I can stay if I want, or if I have offers from the NBA I can accept them."
Too bad he can't come back this year. He wasn't ideal but he had a role.