I'm assuming the Giants will have an 8-man bullpen. Obviously at least one of those guys will be long relief/spot starter. And we may see the "opener" strategy used as well so that may impact who gets picked. As always, take a look at the contract status and number of options remaining. Sometimes that's the only difference between a guy who makes the cut and one who does not.
Tony Watson is a lock. He's signed for the season at $3M. Fellow southpaw Wandy Peralta is also signed ($0.8M) for 2020 and will certainly open the season with the big club.