Well, Yacksel Rios has a "mild sprain" of his ankle, incurred on Thursday. As far as I know, that's the most serious condition of any player currently on the 40-man roster. I don't imagine the organization would want to park Rios on the 60-day DL - that would sideline him through about Memorial Day, which would not be good for his continued development/progress.
It could get interesting, unless they have some trade in the works. Zac Curtis, Hoby Milner are possible outright candidates - as are Cameron Rupp and Tommy Joseph. After that, you're talking young prospects. There are no Kevin Jordans left on this roster.