Definitely take Trumbo for Corbin. You've got a pretty decent SP staff. Once you get Trumbo, drop Lance Romance for a SP off the waiver wire. Corbin's pitching over his head and you'd be smart to sell high on him.
I love multi position eligibility and Trumbo works at 1B/3B/OF. You're pretty set at the corners, but your weak in the OF and Trumbo would be an upgrade there.
I think it's smart to sell high on Corbin right now, plus he's very expendable given your pitching. Trumbo is a nice get. Good to have the positional versatility even tho you don't particularly need it.