I'd avoid that one. Teheran needs to prove he can be more consistent before I start him against a team like Washington. Sure, the Nats bats can go cold at the drop of a hat, but they can also get hot really quick.
Baltimore is top 5 in most offensive categories in the MLB. If the 22 year old Maurer can shut down this potent offense, then maybe, just maybe, this kid could be a viable option in deeper mixed leagues.