Yah, pretty much guaranteed to pick up the Flowers option. No other catcher for 4 million is going to give the sort of value he does. Plan A should be to sign Grandal and let Flowers be the primary back up, ideally getting about 30-40 starts and certainly no more than 50 starts without an injury to Grandal. If that doesn't work out, I'd probably just bring Mac back for 1 more season or sign Jason Castro to be the new Mac. FA is barren after Grandal and Castro and the trade market doesn't look too appealing either.