CHICAGO (Reuters) - Chicago White Sox shortstop Alexei Ramirez has agreed to a four-year, $32.5 million contract extension, Major League Baseball's website said Thursday.

The deal also included a $10 million White Sox option for a fifth year, baseball's website (www.mlb.com) reported.

The Cuban-born infielder, 29, led American League shortstops in hitting in 2010 with a .282 average.

Chicago had earlier picked up an option for 2011, agreeing to a base salary of $2.75 million.

(Reporting by Gene Cherry in Salvo, North Carolina. Editing by Steve Ginsburg)