Tanner Roark struggled early, but settled in, giving up just two runs in six innings in what ended up a 6-4 Washington Nationals' win over the Miami Marlins in the nation's capital. Ryan Zimmerman homered for the first time this season to get the Nats on the board in the second and the Nationals got to Fish starter the second time around, scoring four in the fourth and holding on for the victory to improve to 2-0 on the year.