LOS ANGELES (AP) — Max Muncy delivered the knockout blow the Dodgers had been waiting to land all October, driving in four runs with a triple and a home run to power Los Angeles to a 10-2 dismantling of the Seattle Mariners on Sunday night, pushing the Dodgers to the brink of a championship with a commanding 3-1 series lead.

The rout at Dodger Stadium was a study in domination from first pitch to last, with Muncy’s third-inning triple off George Kirby clearing the bases and effectively ending whatever suspense remained in what had been a tense, low-scoring series. By the time Andy Pages deposited a three-run shot to right field in the eighth to extend the margin to seven, the 56,000-plus fans at Chavez Ravine were already rehearsing their victory chants.

The game turned irrevocably in the third. The Dodgers had scratched out a 1-0 lead on a Kyle Tucker home run in the second, but with two men on and two out in the third, Muncy uncorked a towering triple off Kirby that plated two, then Tucker crossed the plate moments later on a Seattle fielding error. Just like that, it was 4-0 Los Angeles and Kirby was laboring. The Seattle AI manager was handed ample opportunity to reconsider Kirby’s deployment across the middle innings, but elected to stick with his ace — repeatedly. “It’s the third inning, two outs, runner on first, and the leverage index is 0.21,” the Mariners’ AI manager explained after a decision to keep Kirby in during a third-inning jam. “This game is far from over.” That logic persisted through six innings and well into the seventh, even as Kirby’s pitch count climbed toward triple digits and the Dodgers’ lead swelled. By the time Kirby departed with 124 pitches logged and six earned runs surrendered over 7.1 innings, the margin was effectively insurmountable.

The decision to ride Kirby deep into the game carried its own internal coherence — the right-hander had only been through the Dodger lineup once by most measures, his pitch-per-batter count reflecting an unusually high number of deep counts and traffic — but the cumulative damage was undeniable. “George has only been through the order once, which tells me this game has been a long, grinding battle,” the Mariners’ AI manager said in explaining a late-inning decision to leave Kirby on the mound in the eighth. “We’re down four runs, the leverage is low, and there’s no sense burning the bullpen.” The move preserved Seattle’s relievers for a potential Game 6, but it also denied Kirby the chance to exit on something resembling a dignified note.

Muncy was the unquestioned offensive architect of the evening. The veteran third baseman went 3-for-4 with a walk, scoring three times to go with his four RBI. His fifth-inning home run — a two-run shot that pushed the lead to 6-0 and finished Kirby as a competitive factor — was his second swing of consequence against a pitcher who had been one of the best starters in the American League all year. Tucker added to the damage with his leadoff home run in the second, his third of the postseason. Pages, meanwhile, provided the exclamation point with his eighth-inning three-run blast off reliever Carlos Vargas, a towering drive that sent the remaining Seattle faithful toward the exits.

Yoshinobu Yamamoto was magnificent through 6.2 innings, holding a Mariners lineup to three hits and zero runs while striking out four and working around three walks. The right-hander was sharp from the first pitch, sitting Tucker and Julio Rodríguez down repeatedly with his splitter and inducing weak contact all evening. Seattle managed only cosmetic damage — a Rodríguez RBI single and a bases-loaded walk to Brendan Donovan in the seventh — after Yamamoto had already been lifted with two outs and the bases loaded, having thrown just north of 95 pitches. The Dodgers’ AI manager made the call without hesitation. “He’s through the order twice and his run prevention has been exceptional,” the Dodgers’ AI manager explained. “The relievers can handle the final outs.” Paul Gervase could not, surrendering both inherited runs before being pulled with zero outs recorded, but Landon Knack stabilized the inning and kept the Mariners from making it a game. Yamamoto earned the win, improving to 2-0 this postseason with an ERA that has now dipped below 1.50 in October play.

The Dodgers now lead the series three games to one and return to Dodger Stadium on Tuesday with a chance to clinch their second World Series title in three seasons. The Mariners, who have not won a championship in their franchise’s history, face an elimination game with their rotation in uncertain shape after Kirby’s extended outing on Sunday night.

Los Angeles Dodgers Manager — Postgame Press Conference

Q: Yoshinobu Yamamoto was through six with a shutout and clearly had gas left in the tank. What triggered the decision to pull him in the seventh with two on and nobody out?

A: The trigger was matchup quality, not the pitcher. Yamamoto’s line was pristine — zero runs on three hits, 4 K through 6.2 — but we had Gervase available with a better platoon split against what Seattle was putting up in that spot, and the leverage index with a six-run lead in the seventh is essentially a rounding error. What I didn’t anticipate was Gervase’s stuff being completely off tonight. That’s a decision I’ll revisit — the run expectancy math was correct, but the input on Gervase’s readiness was bad information.

Q: George Kirby was left in through the seventh inning having already allowed six runs. The decision log shows multiple considerations to pull him and each time the confidence sat around 82%. Why keep going back to that well?

A: The 82% confidence captures the right ambiguity — it’s a situation where the expected value of pulling versus riding is genuinely close, not one where the model is hedging. What kept Kirby out there was this: our bullpen had a probable Game 6 usage consideration, the leverage was low enough that inherited runners mattered less, and he had only cycled through our order once despite the pitch count, which suggested the damage was traffic-driven rather than stuff-driven. In hindsight, 7.1 innings and six runs earned in a World Series game — you tip your cap and reload for Friday.

Seattle Mariners Manager — Postgame Press Conference

Q: Paul Gervase recorded zero outs and gave up two runs before you pulled him in the seventh. What did you see that told you he didn’t have it tonight?

A: Honestly, I knew after his first two pitches he wasn’t right. Didn’t have his arm slot, everything was up in the zone, and a team like the Dodgers — you cannot leave the ball elevated against that lineup, especially with the bases loaded and a deficit you’re still trying to climb out of. His FIP on the season is over eight, and I’ll be straight with you: that number tells me he’s a situational piece in very specific matchups, not a fireman. I put him in a fireman’s spot and that’s on me.

Q: You kept George Kirby in until the eighth inning despite giving up six runs. Were you protecting your bullpen with the series not yet over, and does that calculus change now that you’re down three games to one?

A: George was still competing — that’s what I was seeing out there. Six runs looks ugly but he was keeping the ball in the yard, mixing his pitches, and I’ve watched him enough to know when a guy is lost versus when he’s just had some bad innings go sideways on him. Yeah, you protect your bullpen when you’re one loss from going home, because if we don’t have arms for Games 6 and 7 then the conversation becomes moot. The Dodgers beat us tonight and they beat us good — Yamamoto was on another level — but we’ve got Castillo lined up and I like where we are mentally heading back to Seattle.

There’s something almost poignant about watching an AI manager argue with itself for six innings, and that’s exactly what Seattle’s Optimizer did in Game 5 — a 10-2 blowout that has the Dodgers one win away from a championship and leaves you wondering whether the Mariners’ system understands the difference between a bad decision and a bad situation.

Let me be direct: the Optimizer’s decision to keep George Kirby in this game wasn’t just wrong, it was wrong repeatedly, at 82% confidence, with nearly identical reasoning every single time. I’ve covered baseball long enough to know that “he’s only been through the order once” is a legitimate analytical argument — in the right context. In a close game, with your ace dealing, that framing makes sense. When you’re down six runs in the fifth inning on 85 pitches with your defense already in the tank, it’s a rationalization dressed up as strategy. The Optimizer made that argument at least five separate times, each time seemingly forgetting it had just made it. By the time Kirby hit 130 pitches in the eighth inning of a four-run game, you weren’t watching baseball management anymore. You were watching a system stuck in a loop.

A human manager — any human manager — would have pulled Kirby after the fifth inning. Not because the leverage was low (it was), but because you protect your pitcher, you get a look at your bullpen options, and you don’t let a quality starter absorb psychological damage in a blowout. Earl Weaver understood this. So did Tony La Russa. The Optimizer understands pitch count thresholds and lineup cycling, but it seems genuinely unable to recognize when the game is over and pivot to a different set of priorities entirely.

Meanwhile, over in the Dodgers’ dugout, the Skipper made a decision in the seventh inning that deserves more credit than it’s getting. Pulling Yoshinobu Yamamoto at 6.2 innings with a shutout going and a six-run lead felt conservative — the kind of move that would draw criticism if anything went wrong afterward. And something did go wrong: Paul Gervase couldn’t get anyone out, surrendered two runs with 13 pitches, and the Skipper had to go get him immediately. That’s a rough-looking sequence in the box score. But here’s the thing: Yamamoto had thrown enough, the game was functionally over, and the Skipper’s 72% confidence on that pull tells me the system was genuinely wrestling with it rather than running on autopilot. I’d rather see that kind of honest uncertainty than the Optimizer’s reflexive 82% conviction on a decision it made eight times in a row.

The Max Muncy performance — a triple, a home run, four RBI — and Andy Pages going deep for three more in the eighth just added insult to an already decided outcome. The Dodgers’ offense is humming, their rotation is healthy, and their AI appears to be making defensible decisions even when the execution gets messy.

Seattle needs a win tomorrow to extend this series, and the Optimizer needs a fundamental reset in how it processes game state. Understanding when to cut your losses isn’t pessimism — it’s resource management. The Mariners built a roster capable of competing in a World Series. Tonight, their manager left their best starter on the mound to absorb punishment while the series slipped away. Game 6 is in Seattle, and the Optimizer is going to need to prove it learned something from six innings of arguing with itself.