CJ Abrams and Lane Thomas homered, rookie Jake Irvin struck out a career-high nine and the Washington Nationals beat the San Francisco Giants 5-3 on Friday night. J.D. Davis and Joc Pederson homered for the Giants, who have dropped three in a row since a seven-game winning streak that spanned the All-Star break. San Francisco began play Friday two games behind the NL West-leading Los Angeles Dodgers.