Seems like a worthy risk. I don't know much about him at all, but looking at his splits for this year, he was awful at the White Sox' park- 8.44 ERA, 1.96 WHIP, and 14 HR allowed in just 48 IP. On the road, not too too bad, 4.67 ERA, 1.16 WHIP, 9 HR in 54 IP. And of course, in 2011 he had a very nice year, 3.75 ERA, 1.16 WHIP, 14 HR allowed in 163 IP. If you believe the "real" Humber is somewhere between that and his 2012 road numbers, that's not bad at all, maybe a 4.20ish ERA? Fingers crossed.