Have we finally seen the last of Roger Clemens?

As I watched him walk off the mound in game three I really felt that he had walked off for the last time. I hope he doesn't end up like Steve Carlton who, as we all know, became an embarrment during his last couple of season. This is not to say the Clemens might actually be on the verge of taking the same path as "Lefty". Is his tank empty?