The Washington Nationals have been one of the best regular season teams in the majors over the last five years, winning three NL East titles. In each of their last two division-winning seasons, only one player has ranked within the top three in WAR among players on the team: Tanner Roark.
Roark, a 30-year-old right-hander, was acquired by the Nats in 2010 in a trade deadline deal that sent utility infielder Cristian Guzman to the Texas Rangers. A former 25th round pick, Roark wasn’t regarded as a very valuable piece at the time.