In a recent interview with MASNSports.com's Byron Kerr, Washington Nationals' right-hander Garrett Mock praised the work Nats' catcher Pudge Rodriguez has done so far this Spring, but this afternoon, the 26-year-old right-hander wil be throwing to backup backstop Wil Nieves when he takes the mound in Viera, Florida's Space Coast Stadium against the visiting Florida Marlins at 1:05 pm EST. Mock will be making his fourth start of the Spring, having allowed 12 hits, 4 ER and 2 HR's in 9.0 IP so far, over which he's K'd 5 without allowing a single walk. Here's the DC Starting Lineup as of 11:37 am EST on Saturday according to MLB.com's Bill Ladson's Twitter (@washingnats):

1. Roger Bernadina - CF
2. Cristian Guzman - SS
3. Ryan Zimmerman - 3B (Word.)
4. Adam Dunn - 1B
5. Josh Willingham - LF
6. Mike Morse - RF
7. Alberto Gonzalez - 2B
8. Wil "Blocker" Nieves - C
9. Garrett Mock - SP