never the changeup.. he threw the curve last season and maybe the season before, but not nearly as much as this season. its a pitch he really worked on in the summer. He's got a couple more inches of drop to it now and he can locate it much better.
He's been throwing the CH for awhile now, it's not new. Improved possibly, but not new. Here's a pitch chart of him from 2007 that was extracted from the pitch f/x technology now at every MLB park.
http://www.azsnakepit.com/story/2008/1/3/191/27898
I knew myself not from anything like that, rather from the numerous times I charted him last season when I worked in the front office of the Milwaukee Brewers. The CH of his is a nasty pitch but it's been around awhile (and been nasty for awhile), it's just the sinker is so good that sometimes he'll throw it 80% of the time in a ballgame (which is a crazy high fastball percentage for a starting pitcher, I know it's a sinker, but it's classified as a fastball b/c that's how he throws it), making people forget about his secondary stuff. But the CV & CH have been there for awhile.
He's a special special talent. There is a RHP HS kid from Kentucky this year who will be drafted high with the last name of Webb, but there is no relation.