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George Kirby

Seattle Mariners RHP AL West 2026
8.5
K / 9
3.6
ERA
1.2
BB / 9
6.5
Avg IP
109
Above Avg
Stuff+
6.1
Proj K / Start

Pitcher Profile

George Kirby is a right-handed starting pitcher for the Seattle Mariners with a Stuff+ score of 109 (above avg — MLB average is 100). Posting 8.5 strikeouts per 9 innings, Kirby demonstrates solid strikeout numbers combined with plus control (1.2 BB/9). Averaging 6.5 innings per start, the baseline projection targets 6.1 strikeouts per outing. The solid ERA baseline (3.6) rounds out a reliable projection profile.

PitchProphet's 4-layer model adjusts Kirby's 6.1-K baseline daily: L1 season stats → L2 weather & air density → L3 opponent K% splits → L4 park factors. On a neutral day vs. an average lineup, the target lines are 6.1 Ks, 3.6 ERA, 6.5 IP, and 1.2 BB/9. Colder weather and favorable wind add roughly 0.3–0.8 extra Ks; high-altitude parks like Coors subtract from the ERA side.

Prop FAQ

How many strikeouts does George Kirby average per start?
Based on a 8.5 K/9 rate across 6.5 average innings per start, Kirby projects to approximately 6.1 strikeouts per outing. This shifts with ballpark, weather, and opponent quality.
What is George Kirby's Stuff+ rating?
Kirby's 2026 Stuff+ is 109 — "Above Avg" relative to the MLB average of 100. This metric evaluates raw pitch quality (velocity, movement, spin rate) and is the strongest single predictor of future strikeout rate.
Is George Kirby a good strikeout prop pick in 2026?
With 8.5 K/9 and 109 Stuff+, Kirby has solid strikeout numbers. The deeper workload (6.5 avg IP) supports higher per-start totals. Check the live PitchProphet projection for today's matchup-adjusted line.

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