If we want Pettigrew we have to take him with our first pick.
I'm a big Everette Brown fan, but the latest word is (can be b.s.) is that 3-4 teams don't think he will be able to transition to linebacker in the 3-4. Thus, the slew of teams that have transitioned to 3-4 defenses will probably not take him.
His best fit is as a 4-3 end for teams running the Tampa Bay D or a variation of it. That leaves very few teams. (Bears, Colts(a variation) anyone else?
Thus, I think Brown has a better chance of being there at 28 than Pettigrew does.