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Reports: Mariners promoting top pitching prospect Kade Anderson

By Thomson Reuters Aug 20, 2026 | 8:53 PM

The Seattle Mariners will call up left-hander Kade Anderson, ranked the top pitching prospect in baseball, ​to make his major league debut ‌against the Chicago Cubs on Saturday, according to multiple reports on Thursday.

Anderson, 22, is also rated the No. 5 overall prospect ‌and ​the Mariners’ top prospect, ⁠according to MLB Pipeline.

Seattle ⁠selected Anderson third overall in the 2025 MLB Draft out of LSU.

Anderson is 10-1 with a 1.06 ERA, ​13 walks and 135 strikeouts in 93 1/3 innings over 18 starts ⁠this season for ⁠Double-A Arkansas. He has allowed ​47 hits and 11 runs, with opponents ​scoreless against him in 13 of his ‌starts.

The Mariners (60-68) lost to Milwaukee on Thursday to fall three games behind the Minnesota Twins for the third ⁠and final American League wild-card spot.

Seattle opens the three-game series against the Cubs on Friday ⁠with right-hander ‌Emerson Hancock as the ⁠scheduled starter, followed by rookie ​Anderson ‌on Saturday and then veteran ​righty Bryan ⁠Woo, who was bumped to Sunday.

The rotation would resume with Bryce Miller, Logan Gilbert and George Kirby for a three-game home set against the Philadelphia Phillies.

–Field ​Level Media