I think it depends on league depth etc etc.. but as stated above, setup men/MR typically have little or no value in most leagues. Even in holds leagues alot of quality guys slip through the cracks and can be grabbed for next to nothing.
Scott Shields..... 6 wins, 2.33ERA, 1.33WHIP, 67K, and 7 saves can make a big difference as the season progresses.
I have gordon & taverez (albiet a holds league) but a combined 4 wins, 80K, 2.60 era and 1.15ish whip have been helpers in all catergories.
If you found my advice helpful, please help me