The Arizona Fall League has turned into a useful stage for the Kansas City Royals’ prospect group, and Justin Lamkin just gave the organization another reason to pay attention.
Lamkin, the Royals’ No. 8 prospect, put together a huge third week in Surprise. He worked 4 1/3 perfect innings, set down all 13 hitters he saw and punched out four. He was sharp from start to finish, throwing 52 pitches and landing 40 for strikes.
That outing was strong enough to earn Lamkin Arizona Fall League Pitcher of the Week honors, giving Kansas City another young arm making noise this fall.
The left-hander’s rise has been steady. Drafted in 2025, he opened the 2026 season with High-A Quad Cities and was excellent there, posting a 1.27 ERA with 38 strikeouts over 28 1/3 innings. That performance pushed him to Double-A Northwest Arkansas, where he added 15 strikeouts in 11 1/3 innings before a left shoulder injury ended his season early.
Even with the abbreviated finish, Lamkin’s first pro season was a strong one: a 2.04 ERA across 39 2/3 innings with 53 strikeouts.
At 6-foot-4, Lamkin is now part of the group of Royals pitching prospects offering some hope for what comes next on the mound. MLB Pipeline projects him to arrive in 2027, and if his recent work in Arizona is any indication, he has a real chance to move quickly.
For now, he keeps building in the Fall League, where he’s already made one loud statement.
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