Koji Uehara
He saved the decisive Game 5 of the 2008 World Series in Philadelphia on October 29, 2008 over the Tampa Bay Rays with a strikeout, to make him 7 for 7 in postseason saves, thus completing his perfect season (a record he shares with John Wetteland, Troy Percival, Koji Uehara, Zach Britton and Greg Holland; Robb Nen was also 7 for 7 in 2002 before he blew one on the 8th opportunity).