3,315 - Nats franchise record (as far as I can tell?????) for most pitches thrown in one season, set by Gio Gonzalez.
4,009 - Nats franchise record for most pitches thrown in one season, Livan Hernandez 2005
246.1 - Nats franchise record for most IP in one season, Livan Hernandez 2005
Max Scherzer could smash the innings record. Too efficient for the pitches one, luckily (?).