Sheets' value to the team is limited with Abreu, Jimenez, and Vaughn all being guys who can only play 1B, or play OF sub-optimally. True that none of those guys are lefties, but you have to have Grandal not catching 20-30% of the time so he can pick up that DH/1B time that might otherwise go to Sheets. You might have 2-3 spots in the post-season where you wish you had Sheets' lefty bat, but you'll have entire games where you wish you had Montas pitching, unless Keuchel is somehow a lot better than last year, which I'm not counting on.