At this point in the injury train we have to stop blaming Rizzo for one thing and start questioning him about another.
It's time to stop blaming Rizzo for the roster construction. It's tempting to say the Nats should have players that are good enough to sub in for injured players over a long time but five injured players? Werth and Span in the OF, Zimm, Escobar and Rendon in the infield? I think it's completely fair to have one guy in the holster for each broad location, someone that can play a month or two. And the Nats had general plans in those cases (Espinosa and Taylor) that were passable. I think a team with injury risks (which the Nats arguably had at every position but shortstop) should also have a 2nd guy on the bench you don't feel bad about playing in shorter bursts. I didn't like the Nats make-up there initially (Moore? Uggla? denDekker?) but Clint Robinson has made himself decent player of this type.
In the pen - well it hasn't really cleared up. I don't like it but it's clear that a decision was made to see if Treinen, Barrett, Grace, etc. can become cheap decent long-term fill ins at the end of games, or maybe the injury returning Casey Janssen can be a steal of a pick-up and they were going to run with that basic idea. They ran through other cheap young options from the minors, picked up Carpenter as another steal attempt. You don't love it but the Thornton, Carpenter, Janssen, Rivero they've landed at is currently fine.
So maybe Rizzo could have used one more reliable bat, and definitely the team needed that 2nd dependable arm in the pen rather than going with Storen and the pen of crossed fingers. Great we can get on Rizzo about that next year if we want. But the Nats are in first and could cruise to the East division titile... as long as they don't screw it up. The "should have built a better X" time is passed. Now we come to the "Fix in trade" part of the season. And will Rizzo do anything?
What do I feel needs to be done? Get that bat needed, get that arm needed, of course. There are two goals for the next few months. One is trying to get the team into the playoffs. These moves may not be necessary to do that. Obviously the team that played last game may not make it but surely more good players will come back from injury than go away... right? Right? I still feel good about winning the division and hope you do to.
The other goal is to get the best possible team into the playoffs. To maximize your chances of winning, however small that maximization would be. It's here where I really think the Nats should get those players. The last two times in the playoffs the Nats went with the "damn the flaws, if we're good enough to get in then we're good enough to win" game plan. They didn't get out of the first round. As I've said before if they want the players to give 100% toward winning, I want to see the team give 100% to winning. Fix the flaws as best you can.
People will say these fixes don't guarantee anything and they are right. They don't. Increasing your chance of winning a series from 35% to 40% is far from a guarantee. But dammit it's time to do this. To try as hard as you can across the board. If not now, when?