Mariners Minor League Review: Inland Empire 66ers

Lookout Landing reviewed the 2026 season of the Seattle Mariners' Single-A affiliate, the Inland Empire 66ers, who finished with a 59-72 record. In their first year as a Mariners affiliate, the team suffered the California League's second-worst record, largely because many 2025 college draftees bypassed Single-A entirely. Despite team struggles, the pitching staff led the league in strikeout-to-walk ratio at 2.80.

Writer Max Ellingsen highlighted breakout standout Mason Peters, who logged a 1.43 ERA and 68 strikeouts over 50.1 innings before earning a promotion to Everett. Hitter Ace Reese dominated with a .440/.530/.667 slash line after being drafted, while Korbyn Dickerson posted 15 home runs and 35 steals across his season split between affiliates.