Brad Stevens wants every player on his roster to be able to shoot from beyond the arc, but wants his best 3-point shooters to continue to expand their shot range. The Boston Celtics head coach thinks the range of which 3-point shots are made only will grow as the years go on, and that means the defenses will play a bigger role in defending the shooter, and noted some of the game’s best shooters will deepen their range and defenders probably should figure out how to stop them now because it won’t get any easier. “For sure. No question, that’s the Steph Curry effect, right?” Stevens told the Boston Herald’s Mark Murphy. “When you