He's definately safe as the closer to start 2007. He was dominate in 2006 and, besides, who else are they gonna use?
Whether he can maintain his dominance in 2007 is another story. I'm usually leery of guys who post drastically improved numbers. Remember Turnbow's miraculous 2005 followed by disasterous 2006?
My best estimate is that Putz falls off a bit but is good enough to hold the closer's job for the season. So if you don't mind a guy named "putz" on your team and can draft him at a discount to his 2006 numbers, then I say fire away.
I am the Master. Don't question the Master. Just do what he says and be proud.