The Red Sox wanted Middlebrooks to make up for some of the at-bats he lost this season due to injury. However, Middlebrooks decided it was best for him to work on being 100 percent by spring training.
"He’s made a decision he’s going to focus on other things," general manager Ben Cherington said. "He feels like he can address what he needs to address without playing winter ball, so that’s the decision that he’s made. Ultimately, the offseason belongs to the players."