How many rings do all those teams collectively have in the last decade? 1?
Well, okay, let's play that game.
2010 Giants: Lincecum (draft), Cain (draft), Sanchez (draft), Bumgarner (draft), Zito (
FA)
2009 Yankees: CC (
FA), Burnett (
FA), Pettitte (draft), Kennedy/Hughes/Joba (draft), CMW (
amateur FA)
2008 Phillies: Hamels (draft), Myers (draft), Moyer (
FA), Blanton (trade)
2007 Red Sox: Beckett (trade), Schilling (trade), Matsuzaka (
FA), Lester (draft), Wakefield (
minor league FA)
If you leave out the Yankees, the World Series winning Free Agent Four is Barry Zito, Jamie Moyer, Dice-K, and Tim Wakefield.