After a fine start to his big-league career, which included being AL Rookie of the Month in April, Kristian Campbell has cooled off. On Friday, he was optioned to Triple A.

The Boston Red Sox have sent struggling second baseman Kristian Campbell to Triple-A Worcester. ESPN's Jeff Passan was first to report Campbell's demotion on Thursday, with the Red Sox officially announcing the move Friday ahead of a three-game series against the Giants in San Francisco.

The Boston Red Sox have reinstated outfielder Wilyer Abreu from the 10-day injured list and optioned Kristian Campbell to Triple-A Worcester. Abreu had been placed on the injured list on June 9 with a left oblique strain and will make his return when the Red Sox open a three-game series on the road against the San Francisco Giants on Friday night.