prior's the best pitcher in the game.
santana is a damn fine pitcher too, but durability is the only question in my mind.
so that's a good twoheaded monster to start off with.
pineiro could be a 3.something era 15 win pitcher at best, but at worst around 10 wins and a low 4 era. solid end of the rotation pitcher.
any yankee starter has a shot at 15 wins, but at what ERA price? i see contreras at 3.5-4.5, dunno where, that will sort itself out.
weaver is overrated. he had like 1 1/2 good seasons in detroit went to new york and imploded. he's on the dodgers? well unless he fixed his head awfully quick, he's not going to have the run support that the yanks would give him, so i wouldnt count on him to win.
good crop of RPs, you should be fighting for the saves title in the league.
so i'd bump weaver out of the mix and depending on your tradable commodities try to land another #2-3 pitcher, around that johan santana type level (young, not fully proven, and cheaper than an established one), maybe you can package a 25/80ish type bat with one of your lesser relievers to do that and you wont catch that much potential damage if it blows up in your face.