PHOENIX — Roki Sasaki gave the Dodgers one to dream on Wednesday night.

Facing major-league hitters for the first time since May 9 and pitching in relief for only the third time after two relief outings last week in Triple-A, Sasaki looked like the dominant reliever the Dodgers desperately need heading into the postseason during Wednesday’s 5-4 victory in 11 innings over Arizona.

He retired the Diamondbacks in order in the seventh inning, getting a groundout and two strikeouts while hitting 100 mph and averaging 99.2 mph with his fastball.

That might have been enough to convince the Dodgers that Sasaki can be a weapon out of the bullpen in the postseason.

“We’re going to see it again,” Dodgers manager Dave Roberts said. “But I do think the arm talent, the pedigree of being one of the

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