Seattle Mariners prized left-hander [PERSON_NAME] will make his major league debut Saturday to start against the Chicago Cubs, manager [PERSON_NAME] confirmed Friday. The 22-year-old prospect dominated Double-A [ADDRESS] last season, posting a 10-1 record with a 1.06 ERA across 18 starts. Selected third overall in the 2025 draft out of LSU, he becomes the first player from his draft class to reach the majors.

"So excited about that," [PERSON_NAME] said. "What an incredible season [PERSON_NAME] has had down at the Double-A level." While rotation details remain unclear, president of baseball operations [PERSON_NAME] emphasized he will begin as a starter. "We're not going to put [PERSON_NAME] in the bullpen," Dipoto stated. The club previously considered a six-man rotation or piggyback strategy to manage workload.

The debut arrives as Seattle navigates pitching adjustments following shoulder soreness for [PERSON_NAME]. At 60-68, Seattle sits four games back of the Houston Astros in [ADDRESS]. They aim to rebound quickly against the NL wild-card-leading Cubs (74-54) after recently enduring a franchise-record shutout loss, hoping their new ace helps close the gap down the stretch.