We seldom see MLB teams begin and finish the year with identical personnel. Players on every roster will be unemployed or working elsewhere when the ball drops to usher in 2014.
The offseason isn't over yet, so several misfits could be traded or released before/during spring training. Most of them, however, will depart as the summer progresses. Anybody certain to leave via free agency has also been included.
Don't let any of these changes catch you by surprise.