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Kirby (8-10) took the loss against the Brewers on Thursday, allowing six runs on nine hits and two walks with three strikeouts over 3.1 innings.
Kirby surrendered all six runs in a nightmare first inning, when he allowed 12 hard-hit balls overall while generating just six whiffs on 84 pitches. It continued an inconsistent year for the 28-year-old, who has now allowed 11 earned runs over his past two starts after yielding just one earned run through his first two August outings. He owns a 4.18 ERA, 1.36 WHIP and 117:33 K:BB across 140 innings this season and will aim to rebound in a home matchup with the Phillies next week.
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Mariners' George Kirby: Struggles in no-decision
Rotowire
Kirby did not factor into the decision in Friday's 10-7 extra-inning loss to the Astros, allowing five runs on eight hits and three walks with two strikeouts over 4.2 innings.
The damage was done early, as Kirby surrendered a solo homer in the first before enduring a four-run second inning. He labored overall, issuing three walks for just the third time this season while generating only seven whiffs on 99 pitches. The 28-year-old has now posted a 4.39 ERA through five second-half outings, though 12 of the 13 runs he's allowed have come in two blow-up starts. He'll take a 3.89 ERA, 1.31 WHIP and 114:31 K:BB across 136.2 innings this season into a road matchup with the Brewers next week.
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Mariners' George Kirby: Settles for no-decision
Rotowire
Kirby allowed one run on four hits and two walks while striking out two over five innings in a no-decision versus the Rays on Saturday.
Kirby was steady, though he wasn't all that efficient, needing 99 pitches (63 strikes) to get through his five frames. He was again let down by his offense, getting just one run of support while he was on the mound. Kirby has allowed two runs or fewer in six of his last seven outings but has just three wins in that span. He's at a 3.68 ERA, 1.27 WHIP and 112:28 K:BB across 132 innings over 22 starts this season. Kirby's next start is projected to be on the road in Houston.
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Mariners' George Kirby: Fires seven scoreless innings
Rotowire
Kirby did not factor into the decision Sunday, allowing five hits and a walk over seven scoreless innings against the Twins. He struck out three.
Kirby silenced the Twins offense across seven shutout innings, though a bullpen implosion kept him from being credited with the win. It was a much-needed bounce-back effort for the right-hander, who was tagged for seven runs in Monday's loss to the Rangers. Overall, the 28-year-old owns an 8-9 record with a 3.76 ERA, 1.28 WHIP and 110:26 K:BB across 127 innings (21 starts) and is lined up to pitch next weekend against the Rays.
Mariners' George Kirby: Rocked for seven runs in loss
Rotowire
Kirby (8-9) took the loss against the Rangers on Monday, allowing seven runs on seven hits while striking out three across four innings.
Kirby tied a career high with four home runs allowed in Monday's game, two of which came off the bat of Joc Pederson, and the seven runs that the former allowed were his most of the season and his most since Sept. 3, 2025. It broke Kirby's streak of quality starts at six, and it was just the second time this season that he completed less than five innings. He'll take a 3.98 ERA and 1.30 WHIP over 120 innings into his next start, which is lined up for this weekend at home against Minnesota.
Mariners' George Kirby: Tosses six shutout innings
Rotowire
Kirby (8-8) allowed three hits and a walk while striking out six over six shutout innings to earn the win over the Reds on Monday.
Kirby kept his hot stretch going, racking up his sixth straight quality start with one of his best outings of the campaign. During that six-start span, he's given up just 12 runs (11 earned) over 38 innings. He now has a 3.57 ERA, 1.28 WHIP and 104:25 K:BB through 116 innings over 19 starts this season. Kirby is lined up to make his next start on the road versus the Rangers.
Kirby (7-8) took the loss Wednesday against the Marlins, allowing two runs on eight hits across six innings. He struck out seven.
It was another strong outing from Kirby, who's now held opponents to two runs or fewer in each of his last three outings, though he ultimately came away with the loss as Seattle failed to generate any runs in a 3-0 defeat. Kirby's turned in five straight quality starts, allowing 11 earned runs across 32 innings during that span. The right-hander will head into the All-Star break with a 3.76 ERA, 1.32 WHIP and 98:24 K:BB across 18 starts (110 innings) this year.
Kirby (7-7) allowed two runs on seven hits and a walk while striking out seven over eight innings to earn the win over the Angels on Monday.
Kirby allowed both runs within the first three innings before settling in for a strong performance. He threw 70 of 100 pitches for strikes in his fourth straight quality start. In that span, he's allowed 10 runs (nine earned) over 26 innings with a 27:6 K:BB. For the season, Kirby has a 3.81 ERA, 1.32 WHIP and 91:24 K:BB through 104 innings over 17 starts.
Mariners' George Kirby: Back in win column Tuesday
Rotowire
Kirby (6-7) picked up the win Tuesday, allowing two runs (one earned) on eight hits and two walks over six innings in a 3-2 victory over the Pirates. He struck out five.
The right-hander produced his ninth quality start of the season on 91 pitches (65 strikes), but it took a Cole Young two-run homer in the top of the seventh inning to finally get Kirby back in the win column. He'd gone 0-5 over his prior six starts, stumbling to a 6.27 ERA, 1.58 WHIP and 33:7 K:BB in 33 innings during the losing streak. With that monkey off his back, Kirby will look to build on Tuesday's performance in his next outing, which is set to come on the road this weekend in Cleveland.
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Mariners' George Kirby: Takes loss in quality start
Rotowire
Kirby (5-7) allowed three runs on eight hits and struck out five without walking a batter over six innings to take the loss versus the Orioles on Wednesday.
Kirby gave up just two extra-base hits, but they were critical. Gunnar Henderson tagged him for a two-run home run in the third inning and Leody Taveras added an RBI triple in the sixth. This was Kirby's second quality start in a row, but he's allowed at least three runs in six straight outings, going 0-5 in that span. He's now at a 4.10 ERA, 1.31 WHIP and 79:21 K:BB in 90 innings through 15 starts. Kirby will look to shake off the funk in his next start, which is tentatively projected to be on the road in Pittsburgh.
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