We mentioned it briefly at the end of the day yesterday, so by now you’ve heard that the Washington Nationals have signed outfielder/firstbaseman Adam Dunn, breathing a bit of off-season life into what’s been a fairly tepid winter for last year’s worst team in baseball. Dunn theoretically adds some much needed pop to the anemic Nats offense. The left-handed power hitter has hit 40 homeruns in each of his last 5 seasons, and has…