Not sold yet on Duke... If he is so Mr. Cy Young, its odd that it took him 5 years in Oakland to crack the starting rotation. I'm not saying last year was a fluke, but it was a weird year with Duke, Gavin Floyd, and Cliff Lee all exploding out of nowhere..
Duke didn't exactly "explode out of nowhere" last year. One of the reasons that he was left in the bullpen so long is because he was pure money as a middle and late reliever and quite valuable to the team in that role. Also if you look at the starting rotation the A's had prior to last year there really wasn't a whole lot of room for him there. He's got great control and a gutsy mentality. The only problem is his health, which was the contributing factor to his poor 2007, of course he only played in 17 games that year.
Obviously successful bullpen guys can have lower ERAs and WHIPs than most starting pitchers but just from watching Duke over the years I can tell you that he's a special talent.
Penny's had some real good spurts (for lack of a better word) but he's not really a high strikeout pitcher so even if he does manage to keep his ERA and WHIP to respectable levels (career ERA of 4.06 and WHIP of 1.34) he just doesn't strike me as being much better than a lot of other guys on the waiver wire and given his health and potential to get rocked I don't think he's worth the risk unless you're in like an 18 team league or something.
Anibal Sanchez looked pretty good when he came up in 2006 but he's been garbage the last two years. He's still pretty young and might have a bright future ahead of him but he'll have to show me something for a considerable length of time before I get too excited about a guy who tossed up an ERA of 4.80 in 07 with a WHIP of 2.07 and an ERA of 5.57 with a WHIP of 1.57 in 08, both years with limited duty.
In my 14 team H2H right now there are at least 10 other guys on the WW that I'd rather take a chance on than Penny or Anibal. I might use them for a spot start or two if they show me something but neither of them have nearly the talent Duchscherer's got.