Mariners Pitch Bad Again and Lose 7-4 to Brewers

The Mariners lost 7-4 to the Brewers on Thursday following another bad outing from a starting pitcher.

George Kirby got shellacked in the first inning. The Brewers sent 10 batters to the plate and scored six runs. Single, walk, double, single, single, double, double, and the game was essentially over. Kirby didn’t get much better from there, though more of the Brewers hard contact found gloves in the second and third innings. After a one-out single in the fourth, Kirby’s day was done with the game 6-0. His 99.3 mph average exit velocity allowed was tied for the fifth highest by a starting pitcher in 2026. This isn’t what you want: 

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I’ve struggled to understand Kirby’s season for months now. He hasn’t been very good. The walks that showed up last year are still there, but the extra strikeouts have disappeared. He was getting tons of grounders in the first few outings of 2026 — a nice comprise for the drop in whiffs — but those are gone now, too. I don’t see anything different in his pitch mix. The “stuff” models still think he’s got the same out of zip. Just now he’s struggling to put away batters with two strikes. He can’t throw the ball over the plate without it getting crushed. And he can’t throw the ball out of the zone because batters aren’t fooled enough to chase. He’s just kind of… bad.

Kirby’s slump is part of an unfortunate trend for many Mariners pitchers right now. The lineup’s mediocrity and The Dan Wilson Conspiracy continue to steal the headlines for this disappointing season, but the team’s relative collapse over the last two months mostly lands on the pitching. They are dead last in the majors in fWAR since the All-Star break. They’re on pace to finish below average for the second year in a row. It’s fair to wonder if pitching is still a strength of this org. It might even be a weakness.

The pitchers who followed Kirby kept them in the game, preventing another 22-0 massacre like Tuesday night. José Ferrer did well to finish out the fourth and get out of the jam. Then Michael Rucker followed and was fantastic, dare I say “again.” He threw 2 2/3 innings, struck out four, and allowed no hits. He generated whiffs on six of 15 swings, and chase on seven of 17 pitches out of the zone.

I love this final at bat against Garrett Mitchell. Rucker starts him off with a cutter for a called strike, which was a lucky call. But after wasting a curve, he pumps 97 mph on the top rail and Mitchell comes up empty. Then he drops the curve again, this time below the zone, for a swinging strikeout. Filth.

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These plots from FanGraphs help illustrate how much separation exists between those two pitches. Not only is there a big difference in movement, the fastball and curveball sit almost 15-mph apart. Batters can’t sit and adjust — they simply have to guess. They guessed wrong on Thursday.

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Rucker has been maligned this year as an unwitting pawn in the great battle to be as mad as possible at Dan Wilson. It’s not really fair, because Rucker has been solid — his FIP- is down to 81, second best on the active roster after Muñoz (72) and well ahead of Eduard Bazardo in third (96). Given the Mariners bullpen has been one of the five worst in the majors since Rucker joined the team on June 12, there’s never really been an occasion where Wilson wasn’t justified in bringing him in. It’s the latest example of why I refuse to buy into The Dan Wilson Conspiracy as an explanation for most of the Mariners mess in 2026. Generally, the players at his disposal haven’t been very good. Rucker is a rare exception.

Speaking of which, with the Mariners down 6-4 and most of the bullpen having pitched the night before because Logan Gilbert couldn’t throw more than five innings, Wilson was forced to use journeyman Jhonathan Díaz in the eighth. He gave up a home run to make it 7-4, which put an already unlikely comeback further out of reach.

The Mariners offense wasn’t too bad in this one. They walked six times, collected six hits, and had several hard hit balls. They scratched across two runs in the second and two more in the fourth, so most of the game was played under the pretense of competition, even if it never felt that way. The most notable thing that happened was Taylor Ward drew his first and second walks in a Mariners uniform; he was acquired at the trade deadline as a walks machine, then went his first nine games in Seattle without one. But it wasn’t enough. The power wasn’t there, and the singles and walks weren’t sequenced to score. With two outs in the ninth, Julio scorched a 111-mph line drive to centerfield that Mitchell flagged down to end it 7-4 — a close-ish game that never was.

The Mariners ended their big scary road trip at a surprisingly decent 4-5 record, with a few impressive wins tucked between some of the worst losses in franchise history. They’ll face the Cubs this weekend and the Phillies early next week. I’m not going to do analysis about their standing, because the season is over. But they’re really not far back, and the schedule lets up after this homestand — the Mariners have the easiest strength of schedule remaining. I’m not sure I care to see a team that can’t hit, pitch, field or run the bases in the playoffs. But I don’t care to see that in the regular season, either, and I’m still watching.