Inbox: What are Rizzo's backup plans?

Nationals reporter Jamal Collier explains how the team could look to trade for David Robertson or look at in-house players like Shawn KelleyLast year, general manager Mike Rizzo had a Plan A and Plan B, but he seemingly settled for Plan C more than once. What are Plans B and C this year?

-- Chris D., Phoenix

It's worth noting that the backup plans for Rizzo worked out pretty well last year -- after striking out on Ben Zobrist and Brandon Phillips, they ended up with Murphy, who certainly delivered for the Nats. Now after missing out on several of the top free-agent closers and closers available via trade, it's safe to say the Nats are exploring Plans B, C, D and so on to fill their void in…