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 in the opener of a four-game series.

The Los Angeles Dodgers took a loss as division play began on Thursday night. Facing off against the National League West rival Arizona Diamondbacks, the Dodgers fell 5-3 even though they had their best pitcher on the mound.

The Los Angeles Dodgers were confident heading into Thursday’s game against the Arizona Diamondbacks. Their ace, Yoshinobu Yamamoto, was on the mound, ready to shut the Diamondbacks’ offense down in the opening game of their four-game series.