We were extremely lucky with the health of the rotation.
And extremely unlucky with every other position. So many people are saying "watch out" for the Phillies being healthy again in 2013 but no one ever mentions that the Nats had to deal with major injuries/lack of playing time to Zimmerman, Desmond, Ramos, Werth, Morse, Strasburg, and Harper.
Yes, we were extremely lucky with our rotation's health last season, something that probably won't happen again, but let's not pretend that the team as a whole escaped unscathed.