Probably one of Peguero or Hudson.
Elvis has five straight zeroes in his game log even if he is still walking too many guys over that stretch with 4 BB vs 5 K in 6 IP. Last pitched 0507.
Hudson was clean in his first three Nasvhille outings (4 K vs 0 BB in 3 IP) before getting roughed up for 3 ER on 0504 and not pitching since.
Of the other 40 Man options Henderson just threw 4 IP last night, Yoho just got sent down, don't think they'd want to pull Misio or Carlos Rodriguez from the rotation, and everybody else is hurt.
Maybe Easton McGee has been the best of the non-40 Man relievers, but not sure he's done enough to warrant the other roster finagling it would take to add him versus Elvis or Hudson.