The Red Sox have done relatively little to address their bench so far this offseason, but the team is on the verge of addressing its catching situation by bringing back Doug Mirabelli. According to sources, Mirabelli has agreed in principle a one-year deal from the team that will pay him in the range of a guaranteed $550,000 to serve as backup to Jason Varitek. The guaranteed portion of the deal is down from the $750,000 Mirabelli earned last season, but incentives allow the catcher to reach an approximate $1 million ceiling that he had last year.