Same: Doc Rivers is the league's most important coach -- Notice we didn't say best coach. That's an argument for another day. Rivers proved his worth as Boston's most valuable asset as the Celtics retained Kevin Garnett and signed Jason Terry, Jeff Green, Brandon Bass, and Chris Wilcox. In addition to attracting players to Boston, the Celtics coach extended Garnett's career last season by moving him to center, and he has helped Rondo develop into a superstar. Rivers is also the team's mouthpiece, and there may not be another personality in sports who's better suited for that role.