With an option for 2013. $1.3MM with $100K signign bonus, $2.4MM, and mutual option for 2013 ($3.5MM if Nats exercise, $250K buyout if they don't, Burnett can opt out if Nats exercise but gives up the buyout). Per Kilgore. Link to follow.
Terrific signing given the market for relievers and Burnett's effectiveness.