I think he has an ERA just over a 3 with 7 or 8 wins. His numbers aren't a fluke for ERA and WHIP he has always had the stuff and right on the border but unless the giants get a couple of bats i don't see 20 wins. Probably not a trade high now with the arm injury i imagine unless he comes back and throws a really good game on Sunday.
I'm not worried about the arm injury... He'll have had a week off and professional sports trainers can do amazing things in a week. Plus he's young and able to heal quickly. Only reason he'd do worse the 2nd half would be because he's not as lucky.