Red Sox to sign Grady Sizemore

— -- Grady Sizemore, a three-time All-Star whose career began to unravel in 2009 due to a seemingly endless string of injuries, has reached agreement on a major league contract with the Boston Red Sox, a baseball source said.

Sizemore will earn a base salary of $750,000, but has a chance to make a total of $6 million if he reaches specified performance bonuses, the source said.

Sizemore, 31, is a career .269 hitter with 139 home runs in parts of eight seasons with the Cleveland Indians. His best season came in 2008, when he hit 33 homers, stole 38 bases and finished 10th in American League MVP balloting.

But Sizemore has appeared in only 104 games since 2009 because of assorted injuries. He sat out the 2012 season with back and knee problems, and missed the entire 2013 season because of microfracture knee surgery.

The Cincinnati Reds were among several teams to express an interest in Sizemore, who has been working out this winter in Arizona with an eye on making a comeback.