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What I find interesting from the list noted is that from what I can tell, in 100% of those cases, the FA acquisition was going to a team that was ALREADY good. I've skimmed the entire list of WS winners in the FA era, and the only case I have found (which is not to same I might not have missed one) where a superstar arrived and turned a losing team into a playoff team was Barry Bonds. San Fran was sub-.500 when Bonds was acquired.
The "straw that stirs the drink" is a valid paradigm. I'm all for it. FIRST, give me the drink. I'm sorry -113 runs isn't a drink to be stirred, unless you're hyped up to stir water.