Yeah, they're very lucky though, because they just used this year's top pick on Parker, a HS arm who may need a decent amount of time to develop. If they hadn't been able to sign Scherzer they would have been without a big time arm close to reaching the majors. That's a problem for them more than a lot of teams because of their lack of young arms in the rotation. Davis and Hernandez are both fairly young, but neither has the type of stuff that you figure will allow them to remain successful in a Unit-esque sort of way. The top arms they have in Triple-A, Nippert and Petit, are decent, but neither possesses front of the rotation potential. Brett Anderson was also called up with Scherzer, but I don't see him being quite as good as Parker or Scherzer.
Sorry for the small rant, but I just wanted to emphasize how important Scherzer's signing really was. I'm really looking forward to the Dbacks actually having a high-profile prospect that's a pitcher for a change.