Two DH only players?
Yoshida is unlikely to see the field much, but I think everyone else will at some point. Refsnyder is a lousy outfielder, but the Sox only have 6 outfielders on the 40 man, and to get that many, you have to count both Yoshida and Jhostnyxon Garcia. Ref not only has to play the OF, he’s the first (and only?) option to back up all three positions.
I could see Romy taking at bats vs LHP as a DH, but it’s far from the only thing he’s going to do. He will take the field at some point. With Cora at the helm, there will be ample days off for other players to ensure it.
I do not see who you mean by the second DH only…