Nearly five months into his first season with the Washington Nationals, Jayson Werth believes he's finally getting into a groove at the plate. Given the lofty expectations that came with his $126 million contract, the upswing is quite overdue. Werth hit a three-run homer, Ross Detwiler took a four-hitter into the seventh inning and the Nationals beat Arizona 4-1 Monday night to extend the Diamondbacks' losing streak to a season-high six games.