Ketel Marte hit a game-winning three-run home run with two outs in the ninth inning on Tuesday, May 19, 2026, lifting the Arizona Diamondbacks to a 5-3 victory over the San Francisco Giants in Phoenix.
Marte entered the ninth a single shy of the cycle. He had set the table for the late heroics all night: Marte led off the game with a deep double and scored on a Geraldo Perdomo sacrifice fly in the first inning, then added a two-run home run off Tyler Mahle in the third inning. The Diamondbacks completed a sweep of the Giants when Marte’s ninth-inning blast put the game out of reach.
The scoring was stitched through a game that began with a flurry. Corbin Carroll tripled and scored on an error in the first inning, and Willy Adames hit a solo home run in the second. For San Francisco, Casey Schmitt homered early, and the Giants’ final run came in the late innings on consecutive singles by Matt Chapman, Daniel Susac and Drew Gilbert.
Merrill Kelly started for Arizona and worked through traffic: he allowed eight hits and no walks while helping the Diamondbacks hold a three-run margin. Those peripherals sit beside less flattering season numbers — Kelly still carries a 5.71 ERA, a 1.51 WHIP and a 4.5% home run rate — but on Tuesday he escaped trouble enough times to let his offense take over.
Marte’s night was more than one swing. He was a single away from the cycle and finished with the kind of late-game power that has defined a recent stretch: the primary article notes he had an electric walk-off homer the night before and carried a.325/.378/.625 slash line over his previous 10 games while Arizona went 7-3 in that span. That form made Marte the obvious man to turn to with two outs in the ninth.
The tension in Phoenix was the contrast between the Diamondbacks’ bounce-back hitting and their shaky starting pitching metrics. Kelly gave Arizona length and limited free passes, but his season numbers underline why every big hit matters: when starters are allowing baserunners at a higher clip, the margin for error disappears and late-inning swings decide games. Marte supplied two of those swings — in the third and the ninth — and the difference was decisive.
The sweep of San Francisco completes a compact statement. Marte’s back-to-back game-ending homers and his hot run at the plate have flipped innings that might otherwise have been close into comfortable wins for Arizona. For readers who want a direct look at the ninth-inning play, see Giants Game Today: Ketel Marte’s Ninth-Inning Three-Run Shot Wins It at
Marte’s performance on Tuesday does one clear thing: it centralizes him in Arizona’s late-game calculus. With a single away from the cycle and a three-run shot with two outs in the ninth, he showed why the Diamondbacks have leaned on him recently; if he keeps producing at this.325/.378/.625 clip, he will remain the difference-maker every time the game tightens.
