The White Sox and reliever Matt Thornton have agreed to terms on a two-year contract extension. The two-year addition is worth $12 million and includes a club option for 2014. "It was an easy choice with an organization like this with what they've done the last five months or so, maintaining the core guys, adding the pieces and expecting to win," Thornton said. "That's my goal, is to win at least one World Series." Thornton is among the candidates to become Chicago's primary closer.