Gabriel Moreno hit a grand slam off Yoshinobu Yamamoto, Brandon Pfaadt threw 6 1/3 scoreless innings and the Arizona Diamondbacks beat the Los Angeles Dodgers 5-3 on Thursday night in the opener of a four-game series between NL West rivals. Shohei Ohtani hit a solo homer in the ninth — his 11th long ball of the season — but the Dodgers have now dropped three of their past five games. Yamamoto (4-3) came into the game with an 0.90 ERA, which led the big leagues, but ran into trouble in the fourth.