What happened: The move would mark the prospect's major league debut. He has recorded a 1.06 ERA with 135 strikeouts, 13 walks and 47 hits allowed across 93.1 innings.
Why it matters: The Seattle Mariners would add a high-end young arm during the regular-season stretch run. The planned promotion comes one year after the left-hander was drafted third overall.
By the numbers: His 2026 rates translate to 13.0 strikeouts and 1.3 walks per nine innings, a 10.4-to-1 strikeout-to-walk ratio and a 0.64 WHIP.
What to watch: Watch for Seattle to confirm Saturday's starter and the timing of the corresponding roster move.