Nationals infielders (not including catcher or pitcher): 15.2 fWAR
Astros' entire team (hitting and pitching): 15.3 fWAR
I admit I was hoping the Nats would edge them out.
I think it would be interesting to see how the Nats would do if the rest of the non-infield was replacement level. Would they be as bad as the Astros.