The San Francisco Giants keep running into the same wall, and on June 30 at Chase Field it happened again. Arizona handled them 8-2, with Landen Roupp’s start going south and the offense offering little outside of Luis Arraez’s hot bat.
That result was more than just another loss. It was the Giants’ eighth straight defeat against the Diamondbacks, a stretch that has turned Arizona into San Francisco’s most frustrating matchup of 2026. Every time these teams meet, the same pattern seems to show up: the Giants leave with another loss, and the Diamondbacks keep adding to a run that now stands as the most consecutive victories against an opponent to begin a season in franchise history.
Arizona’s success against San Francisco is also doing a lot of the heavy lifting in the standings. The Diamondbacks are 13-2 against the Giants and Rockies, while going 30-40 against everyone else. That split tells the story pretty plainly: Arizona has been piling up wins where it has been able to dominate.
The first meeting between these teams came on May 18 in Phoenix, and it set the tone fast. Arizona rolled to a 12-2 win in the opener, then followed it with a crushing comeback the next night. The Giants had a 3-1 lead in the ninth before Ketel Marte hammered a three-run walk-off homer to left field, and the Diamondbacks finished the sweep the next day with a 6-3 victory.
A week later, the scene shifted to San Francisco, but the result stayed the same. Merrill Kelly beat Roupp in the opener, Eduardo Rodriguez followed by outdueling Tyler Mahle, and Mike Soroka then took care of Tony Vitello’s squad. The scores - 6-2, 7-5 and 3-2 - added up to another sweep for Arizona.
The last two losses have come over the past couple of days. On June 29, the Giants were trying to close out the month after series wins over the Athletics and Atlanta Braves, but they came up short again in a 5-4 loss.
Rodriguez was excellent once more. Then came the June 30 defeat, the 8-2 game that only deepened the feeling that San Francisco has no answer for this opponent.
There are still five games left between the Giants and Diamondbacks this season. For San Francisco, the only hope now is that one of them finally breaks the pattern.