No, I think that Kershaw should win (at this point). As for park factor numbers, the atmosphere, air pressure, humidity and temperature in Phoenix is very similar to Vegas. Now Vegas is at a higher elevation by about 300 m and of course that makes a difference. Phoenix at over 300 m still launches baseballs. My point was about the air. It is the thin and dry air that causes the same effect. The ball doesn't really break. It is a huge factor for pitchers, no matter what park factor says. Park factor does not measure the spin, rotation and break on baseballs due to atmospheric pressure.