A few sleeper pitchers? Hmm....
How about Oliver Perez? He is reportedly in good shape this year, as he learned his lesson last year with the skipping of winter ball. He'll bounce back, and could potentially have a season much like '04.
How about Jeremy Bonderman? For some reason, this guy gets no respect. Rememeber how young he still is. Pitches in a nice park, and could also bounce back nicely.
May not be sleepers in the traditional sense, but these guys can be had late and provide a tremendous reward.