Thornton gets 2-year extension

GLENDALE, Ariz. — Left-handed reliever Matt Thornton agreed to a two-year, $12 million contract extension with the White Sox on Sunday.

The deal includes a club option for 2014. Thornton, 34, will receive $5.5 million each in 2012 and 2013. The Sox hold a $6 million option for 2014, which includes a $1 million buyout.

Named to the American League All-Star team as a setup man last season, Thornton’s role is yet to be determined for this season. He is being considered for and has expressed a desire to be the Sox’ closer.

Thornton is 26-23 with a 3.68 ERA with 436 strikeouts in 410 career games over seven seasons with the Seattle Mariners and Sox. He was 5-4 with a 2.67 ERA In 2010, and he led all AL relievers with 12.02 strikeouts per nine innings. He also had eight saves.

He is one of four relievers with 20 or more holds in the last three seasons.