Blake Griffin‘s versatility convinced the Celtics to take a flier on him, according to Jared Weiss of The Athletic. He was used more as a floor spacer and roller rather than the post-up scorer last season with the Nets, and he’s an adept ball handler. That makes him a more natural fit in Boston’s scheme. Griffin, who agreed to a one-year guaranteed deal, could see minutes at either power forward or center despite his defensive limitations. With Ime Udoka out of the picture and young assistant Joe Mazzulla serving as the Celtics’ interim coach, Al Horford and Jayson Tatum need…