I'm still scratching my head wondering what Beane saw in Grossman.
he takes walks and he's cheap. Can play both corner OF spots at need, DH, and can hit in any spot in the order without complaint. I wouldn't want to start a Grossman, but there have been years where we sure could have used him as a 4th OF. The upside is limited, but the floor is pretty good.
I agree with Seth; you don't deal rosario just to deal him, especially because it risks your depth if Rooker/Kirilloff/Larnach isn't ready to seize the opportunity. Wade & Cave are decent enough players...who are best suited to be 4th OFs, I think. We don't know for sure how much wade can really hit in MLB and if he can't he won't be as effective drawing walks. Cave looks like he might be better than Rosario with his more patient approach, but he also might get exposed with more ABs.
I think there might be some good partners out there, but I'm not exactly in "trade him now" mode. Unless we add another guy to the roster who seems like he might be a little crazy. You only should have 1 of those.