Tanner Roark struggled in his first three outings of the season with Miami, raising questions about if he was tipping his hand, but the Washington Nationals' right-hander held the Marlins in check in a 4-1 win in the series opener in Marlins Park tonight. Ryan Zimmerman and Michael A. Taylor homered early and Roark and the Nats' bullpen limited Miami to one run in Marlins Park. Two more with the Fish to come this week. Nationals 26-16 after their third-straight win overall.