Drafted by the Red Sox in the 4th round of the 2003 amateur draft, Papelbon made his Boston debut on July 31, 2005, at the age of 24. Papelbon first came up as a highly-touted starter in 2005, but in 2006, when the rotation was less of a problem than a shaky, broken-down Keith Foulke, the fiery Papelbon was given a chance to be Boston's closer. He recorded the final out (by strikeout of course) to clinch the 2007 World Series championship when Boston defeated the Rockies. Papelbon has 188 saves, most in Red Sox history. He bolted to the Phillies as a free agent after the 2011 season.