The Celtics’ offseason overhaul has resulted in more problems than solutions as they enter 2013 a sub-.500 team, a defensive laughingstock, and a shell of their former selves.

Their plight isn’t as hopeless as Willie Mays trying to chase fly balls at the end of his career, Frank Sinatra singing from a teleprompter, or Muhammad Ali unable to avoid Larry Holmes’s jab, but the Celtics may be headed in that direction.