im actually not that concerned about the pen
we have alot of young pitchers that could build a decent pen....the trick is actually finding the right combo
but you have parnell (sigh), mejia, familia, mazzoni, carson, edgin, leathersich, degrom, mchugh, pill, gorski, verret, and even tapia all as guys that have been mentioned as possibilities for the pen this season as very few have the stuff to make it as starters....tapia would only be late in the season and only if they give up on him as a starter
i think, out of those options and a few veterans, you can actually build a decent pen