PHOENIX — Ketel Marte homered in his fourth straight game, Lourdes Gurriel Jr. added a three-run homer and the Arizona Diamondbacks extended their dominance against the San Francisco Giants with a 8-2 win on Tuesday night.The D-backs are 8-0 against the Giants this season, winning five times in Arizona and three times in San Francisco. Gurriel’s three-run homer in the first was his second long ball of the season and barely cleared the fence in left center. It came one pitch after he successfully challenged a strike call that was subsequently changed to a ball. Jorge Barrosa walked with the bases loaded and Marte added a two-run single in the third to push the lead to 6-0. Marte hit a 431-foot solo homer in the sixth, becoming one of 11 big leaguers to homer in at least four straight games this year.San Francisco’s Landon Roupp (5-8) had a rough outing, giving up six runs over 2 2/3 innings. The right-hander gave up five hits, walked six and struck out four.Brandon Pfaadt (1-1) was back in the starting rotation for the D-backs after getting demoted to the bullpen early in the season and then spending roughly a month in Triple-A. He was brought back to the big leagues to try and help stabilize a pitc …
