If you've got a roster spot open, De Rosa is a good grab. With his eligibility, you can plug him into your roster when others have an off day. He probably won't be worth keeping on your roster all year, but, then, sometimes it's nice having that one roster spot which you use to rotate in the hot guy.
"The game has a cleanness. If you do a good job, the numbers say so. You don't have to ask anyone or play politics. You don't have to wait for the reviews." - Sandy Koufax