The Washington Nationals will take on the St. Louis Cardinals in the 2012 National League Division series, beginning Sunday in St. Louis. Though not official, reports are coming in regarding the Washington roster for the series, with the biggest names being left off John Lannan and Mark DeRosa. Via Adam Kilgore of the Washington Post:

Nats roster all but official. No surprises. No DeRosa, no Lannan. 8 relievers, incl. Garcia. Gorzelanny on, Duke not. Again, no revelations.

— Adam Kilgore (@AdamKilgoreWP) October 6, 2012

Amanda Comak of the Washington Times adds that three Washington players have been sent to Florida to stay prepared, in case the Nationals make the NLCS:

The #nats decided to keep Tom Gorzelanny, Tyler Moore & Christian Garcia. Eury Perez, Sandy Leon & Corey Brown went to Florida to stay ready

— Amanda Comak (@acomak) October 6, 2012

First pitch of Game 1 is scheduled for 3:07 p.m. ET., with Washington's Gio Gonzalez (21-8, 2.89 ERA) facing St. Louis' Adam Wainwright (14-13, 3.94 ERA). Gonzalez won his only start of the year against the Cardinals, pitching a five-hit shutout Aug. 31 at Nats Park. Wainwright was 1-1 with a 7.27 ERA against Washington this season.

UPDATE: Below is the official NLDS roster, via the Washington Post:

ROTATION
1. Gio Gonzalez
2. Jordan Zimmermann
3. Edwin Jackson
4. Ross Detwiler
BULLPEN
5. Drew Storen
6. Tyler Clippard
7. Sean Burnett
8. Craig Stammen
9. Christian Garcia
10. Tom Gorzelanny
11. Michael Gonzalez
12. Ryan Mattheus
LINEUP
13. Jayson Werth
14. Bryce Harper
15. Ryan Zimmerman
16. Adam LaRoche
17. Michael Morse
18. Ian Desmond
19. Danny Espinosa
20. Kurt Suzuki
BENCH
21. Tyler Moore
22. Steve Lombardozzi
23. Roger Bernadina
24. Chad Tracy
25. Jesus Flores