I do not like that away split at all. I'm getting a bad feeling about this ....
Why? What don't you like? Don't get swayed by the ERA and W-L. Those are never the best numbers to use to judge a pitcher.
Looking at the raw stats, they are very similar. Over his career of 46G/273IP home and 49G/262IP away, he's got very similar numbers of HR, SO, and BB. He's actually given up fewer HRs, struck out more, and walked less away. Those are the numbers a pitcher can really control, and they're similar. Oscillations in ERA and W% need to be attributed to some other factors when those numbers are similar, especially with the BABIP differential being a bit wacky. The biggest concern with him is always going to be the walks. But that doesn't seem to be a matter of home or away. He's a strikeout pitcher, and he will now be facing NL lineups without the DH. There's reasons to be very bullish on him.