I drafted Clemens and then picked up Willis in the first week, since no one else drafted him. I couldn't be happier. (I've got Beckett, Garland, Patterson, and Escobar/E. Santana rounding out the rest, none of whom have given me anything to complain about.) It has been awesome.
Some weeks Clemens gives me a Monday with like 0.00 ERA and 0.76 WHIP and then I just saw screw K and W, and the other four stats (L, HR, ERA, WHIP) are guaranteed just by sitting on my starting pitchers (Yahoo only requires 7 IP per week).
The only downside to this approach is that if a closer screws up, it can have major consequences with so few IP, but then it's usually easy to fix with a few more good closes, or I can always start the rest of my pitchers at that point. This week, my opponent doesn't even have closers, so once I got a save I stopped using them too. There's nothing he can do -- my ERA is 1.50 and WHIP is 0.92.
Would not be possible to do this sort of thing without Clemens (and Willis) being so reliably awesome. In fact it was Willis who gave me this week's great start -- and I gnashed my teeth and benched Clemens yesterday because I figured if he even gives up two runs it inflates my ERA. But of course he did awesome, as usual.