The hot streak that moved the Arizona Diamondbacks back into the NL West picture fizzled with four consecutive losses to baseball's best team. Sonny Gray looks to continue his personal roll as his last-place Oakland Athletics try to hand the Diamondbacks their sixth straight loss at home Friday night in the opener of a three-game series. Arizona (62-65) used a four-game sweep in Cincinnati last week to move within five games of the division-leading Los Angeles Dodgers.