...except they didn't obtain "multiple good pieces, a better manager, or improved pitching" during the offseason.
I never said there was a direct comparison, or that the Mariners are even well constructed from top to bottom. I do believe that the team is capable possibly winning that poor division or securing a wild card spot. I don't believe that is a strong possibility or the solution is throwing more money at random players just because they are available.
Health played a bigger role for Boston than a better manager, thats for sure.