At $4.6M they have to tender him a contract. That's a fair price for an experienced reliever and a bargain for a starting pitcher.
Someone in this rotation is getting traded during the offseason. A rotation of Ryan, Lopez, Ober, SWR (no options), and Bradley (no options) keeps both Abel and Matthews in St. Paul. Both of those pitchers need major league innings to develop, they're done with AAA. If they keep Ryan and Lopez, then Ober needs to go. If they trade Ryan, then Ober will probably keep his spot until at least July and the Twins will hope he has a bounceback season so they can trade him at the deadline.
However, if another team values Ober like this:
then we could see both Ryan and Ober dealt.