Apparently. And apparently, they don't expect to face a single left-handed hitter with a platoon split, either.
Here's their current pitching staff:
RHP Dan Haren
RHP Edwin Jackson
RHP Ian Kennedy
RHP Rodrigo Lopez
RHP Kris Benson
RHP Blaine Boyer
RHP Esmerling Vazquez
RHP Leo Rosales
RHP Aaron Heilman
RHP Bob Howry
RHP Juan Gutierrez
RHP Chad Qualls
Yup, that's 12 pitchers, and not a single lefty on the entire staff.
You know what else is weird? Their next series is against Philadelphia. Yeah, the Philadelphia that has Ryan Howard, Chase Utley, Shane Victorino, and Raul Ibanez all batting left-handed. So this isn't exactly a case of the team stacking up on match-ups for a big series.
I'm sure that they'll be really happy when Howard comes up to face a righty (career wOBA vs. RHP: .431) because they don't have a single lefty to face him (career wOBA vs. LHP: .321). I know that guys like Jordan Norberto and Zack Kroenke are nothing special, but that's just some odd roster management right there.