In my opinion, the Red Sox have three positions that are left as question marks for next year. The three positions are catcher, shortstop, and center field.
Jason Varitek hasn't been producing like he has been these last couple years. Sure, he can call a great game, but hitting .215 just can't cut it.
Over the offseason, I wouldn't be surprised if the Red Sox tried to get a decent, young talent to back up Varitek. This would put pressure on V-Tek to produce, and if he doesn't, he doesn't get to play.
Julio Lugo being hurt this year is probably the best thing that could happen to the Red Sox. This allowed Jed Lowrie to get playing time. During his playing time, Lowrie has stepped up in pressure situations and produced. I am almost positive that Lugo will not be on the roster next year and Lowrie will have the starting job.
Jacoby Ellsbury and Coco Crisp have split time in center field this year. Next year, I believe Jacoby will take over the starting position. I wouldn't be surprised if the Red Sox deal Coco over the off-season for a lefty reliever.