That's what the Celtics have done with Jeff Green, picking him up from the Oklahoma City Thunder at the trade deadline and quickly integrating him. He's the first guy off the bench now for Doc Rivers, and sometimes he stays out there and plays in crunch time. The C's have found a bench guy they can really trust.
So where does Green rank among the league's best sixth men? Well, nowhere yet. He's only been in that role for a week, so he still has to earn his spot on the list.
But here's a list of 10 guys who really know how to come off the bench and help their teams win. Every great team has a sixth star, and these guys are the best of the best.