I’ve often said there’s little to no difference between players at the end of NBA benches and star players in other top professional leagues worldwide — whether that’s the Spanish ACB League, the D-League or whatever. When I say that, Sasha Pavlovic is exactly who I have in mind.The Celtics (oddly) re-signed Pavlovic, giving them 14 players in total. I’m not sure why. His PER has been somewhere between atrocious, abominable and “can’t we just re-sign a 41-year old Todd Day instead?” for the past four seasons, including one season when Pavlovic was the single worst player in the NBA by at least one measure. Using rational thinking, it’s difficult to imagine why the Celtics decided to stick with Pavlovic rather than add another NBA free agent, call up a current D-Leaguer or even sign the top scorer in the Boston YMCA men’s league. Pavlovic has been that bad for the past four seasons.Doc Rivers noted on multiple occasions last season that he felt Pavlovic did a nice job defensively, and that’s fine. But he’s a disaster offensively and has been for a number of years. The 14th roster spot should have been given to someone young with potential, rather than a journeyman who has already proven — season after season — that he’s no good. It’s a curious signing, to be as kind as I can be, even considering that the Celtics need depth.