2026 Fantasy Baseball Value Ace: George Kirby

George Kirby’s 2025 season read like two different books glued together: a bruising prologue written in March, followed by a dominant middle act and a jarring epilogue that reminded fantasy owners how quickly momentum can flip. The right-hander missed the first seven weeks with a right-shoulder strain, then was tagged for 11 earned runs and 16 baserunners in his first 8 2/3 innings back. From that low point forward, however, the 27-year-old looked every bit the front-line starter Seattle has long projected, going 8-3 with a 2.83 ERA, a 0.983 WHIP and 82 strikeouts across 76 1/3 frames over his next 13 outings.

The final ledger shows why drafters are willing to gamble on a rebound. Remove four forgettable starts—two in his initial return and two late-season blow-ups in which he surrendered 14 earned runs in 6 2/3 innings—and Kirby was essentially an ace: 10-5, 2.77 ERA, 0.985 WHIP, 124 punch-outs in 110 2/3 innings. The catch, of course, is that those meltdowns count, and they were fueled largely by road struggles. Away from T-Mobile Park he was tagged for a 5.16 ERA and 1.281 WHIP while striking out just 64 in 59 1/3 innings.

Batted-ball data explains some of the turbulence. Kirby’s four-seam fastball still hummed in at a career-average 96.2 mph and held opponents to a .196 average, but everything else was hittable. His sinker (.328 BAA), slider (.257) and curve (.258) all leaked loud contact, contributing to career-worst marks in exit velocity (90.6 mph) and hard-hit rate (43.9%). Line drives jumped to 22.3 percent, and while he trimmed his fly-ball rate to 33.5 percent, the damage was already done.

Pitch usage may hold a clue to both the shoulder issue and the lack of a put-away offering. Kirby all but scrapped the split-finger that had accounted for 10.2 percent of his pitches in 2024, dropping it to 3.2 percent in 2025. The absence of a reliable change-of-pace left him without a swing-and-miss weapon when hitters timed the heater, and fantasy managers are left wondering whether a revamped changeup—or a retooled splitter—will resurface in 2026.

What keeps Kirby in the SP2 conversation is the same trait that made him a coveted prospect: elite command. His 9.8 K/9 last season was a personal best, and his walk rate remained minuscule. If the Mariners let him re-introduce an off-speed pitch that can miss bats—and if his shoulder cooperates—there is 200-strikeout upside wrapped inside a 3.00-ERA, 1.05-WHIP profile. The price tag in early 2026 drafts is unlikely to match that ceiling, making Kirby one of the clearest value plays on the board for rotisserie and head-to-head formats alike.