Takashi Saito, RHP
His numbers are absolutely sick, a 1.95 ERA in three seasons with the Dodgers. After a 2008 season interrupted by a right elbow injury that kept him on the disabled list for two months, Saito came to the Sox as one of their bargain-bin purchases. At his best, he's one of the top closers in baseball. If he can maintain his effectiveness, he could lessen the burden on Jonathan Papelbon in the late innings.