ok listen - what kind of numbers do you think it takes to win ERA? WHIP?
Just taking a stab at it Id say close to a 3.5 ERA is your goal, and a 1.22 WHIP should put you up near the top.
Now, what kind of numbers do you see for these pitchers? 4+ERA 1.3+ WHIP essentially.
Do any of them have a high K/9?
Wins. Thats all those guys might help you in. Why do you want them? Taking pitchers because of their wins is a terrible strategy, but a strategy that is used too often by unknowledgable fantasy players. If a player helps you in Wins, but hurts you in two other cats getting those wins, is he worth it? NO!!!
The Yanks - humor me - what top MR pitchers are still available?
Rincon? Hawkins? Otsuka? These guys are so much more valuable than these dumpy pitchers you are choosing between its not even funny. Since its a roto league that (I assume) has an IP limit, you essentially have to look at what these pitchers do on a per IP basis. The top MR wins/IP, K/IP, ERA, and WHIP compare to the elite SPs in this league - like RJ and Santana. Put a couple together and have them help you in 4-5 cats instead of grabbing Pettitte because he has a recognizeable name, used to play for the Yankees, might get 15 wins, but hurt you in everything else.
BTW yanks04 - I think the Penny grab was solid.