You got a good team on paper (pixel...whatever).
I don't like Young worth a hoot....low avg, streaky, etc. but everything else being equal, i'd probably not deal him for bailey. Maybe seek out someone off the waiver wire to replace fuentes eventually (the hardball times does a pretty good job of keeping up with the closing situation...link here: http://www.hardballtimes.com/main/fantasy/article/closer-watch/
, but you have to read the updates to take full advantage).
Young actually plays everyday, Bailey might not even have the job. and WOW, who would have thunk Madsen would be so effective? How long will he keep the job when Lidge gets back...is it his to lose??? Stay tuned! Between Walden and Wilson and Capps (oh my) and the aforementioned Madsen you should be averaging 6 or 7? saves a week.
I had Fuentes in one league, and just dropped him for Salas, so i hear where you're coming from about his left arm not having many closing opps, but really your whole team looks pretty good, closers included.