Nats Arms Race looks at where the roster stands today.
http://www.nationalsarmrace.com/?p=14632He notes we're limited in moves because AJ Cole, Grace, Solis, Goodwin, and Romero are all out of options. And we're still in need of a Chris Heisey / Howie Kendrick type who can play the OF and be a RH pinch hitter off the bench (presumably to replace Stevenson).
Current Roster:
SP: Scherzer, Strasburg, Roark, Gonzalez, Cole
RP: Doolittle, Madsen, Knitzler, Kelley, Grace, Solis, Romero.
C: Wieters, Severino
Inf: Zimmerman, Murphy, Rendon, Turner, Adams, Difo
OF: Eaton, Taylor, Harper, Goodwin, Stevenson