Jordan Crawford has called a selfish player for years, despite being only 25 years old. Crawford came to Boston last February after complaining in Washington that he should have been given a larger role after essentially being benched when John Wall returned from injury. Feeling a sense of freedom when he came to the Celtics, Crawford learned about winning from the veterans. He kept his mouth shut, but that scorer’s mentality crept back in. So when the Celtics didn’t pick up the fifth-year option on Crawford’s contract, it was no surprise. Management wanted Crawford to determine his own fate. He’s been playing well this season, including Monday night at TD Garden, finishing with 16 points, 10 assists, 5 rebounds, and no turnovers in 33 minutes.