Nashek is tough, but his ip/g as of this writing is only 0.93 so you'd probably have to set his count at 10/15 and adjust to 10/10 periodically to avoid in game and season fatigue. How about Aroldis Chapman? He's featuring a .133 OAV, 0.89 WHIP, and a 0.22 hr/9. He has an incredible 76 k's in 39.1 ip for a 17.5 k/9 figure. Not thrilled with his 4.14 bb/9, but he looks to be a good one.
Wade Davis has slipped a bit since I originally posted over a month ago, but he still hasn't given up a homer and now has 55.1 ip with 85 k's for a 13.93 k/9 vs. 3.25 bb/9. With a .146 OAV, I'm anxious to see if he can finish the season out on same flight path and then try him out when the 2014 players are released in early October