I went with Shafer too M2. I think there's a lot to be said for the value of attrition. Maybe he doesn't have the ceiling some guys do, but any guy with these career numbers:
2.60 ERA
1.11 WHIP
7.31 H/9
0.51 HR/9
9.84 K/9
I don't know much about his stuff, and I know he's a reliever, but you can't deny those numbers. He's been flat out dominant. Why we need 8 veteran relievers who only serve to block the way for guys who appear ready to go (or darn close) like Shafter and Salmon is beyond me. I'm a bit wary of listing a high potential guy with only 275 professional ABs over somebody who's been excellent for over 3 years.