Let’s get this right out of the way: Marcus Smart is not especially good at shooting a basketball. In fact, you could say he’s among the worst long-range shooters in the NBA. There is a “however” here, however. Smart long has frustrated Boston Celtics fans by firing up brick after brick from beyond the arch. But this season, at least, the Celtics guard actually has been as good as one of the NBA’s premier marksmen. Check out this wild stat from MassLive’s Tom Westerholm: That’s right: Smart basically has been as good as Klay Thompson from 3-point range this season. Through 23 games, Smart has made 25 of 75 shots from ... NESN.com