Top Seattle Mariners pitching prospect Kade Anderson shined in his pro debut with Double-A Arkansas and outdueled a division rival’s top pitching prospect in the process Friday night.

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Anderson, the No. 3 overall pick in last year’s draft, struck out six and allowed five hits and one walk over four shutout innings against the Midland Rockhounds, the Double-A affiliate of the Athletics. He threw 59 pitches and 43 strikes in his first taste of pro ball. Two of the five hits he allowed didn’t leave the infield.

Welcome to pro ball, Kade Anderson!

The @LSUbaseball product and @Mariners prospect registers his first strikeout for the @ARTravs. pic.twitter.com/EgZd8Plv2L

— Minor League Baseball (@MiLB) April 4, 2026

You can see more of the highlights from Anderson’s outing in this social media post from Mariners Minors.

Anderson is the Mariners’ No. 2 prospect and No. 18 in all of baseball, per MLB Pipeline. After taking him third in in the 2025 draft, the organization elected to shut down Anderson following a heavy innings workload at LSU, where he helped the lead the Tigers to a national title.

The left-hander appeared in three Cactus League games for the M’s this spring, allowing five runs on seven hits and three walks while striking out nine over seven innings.

There’s a chance Mariners fans will get to see Anderson pitch in the big leagues at some point this season. The 21-year-old was considered by many as the most MLB-ready pitching prospect in last year’s draft. General manager Justin Hollander didn’t rule out an Anderson debut in 2026 when spoke with Seattle Sports’ Brock and Salk during spring training in early March.

“I don’t think it’s out of the question that those guys pitch in the big leagues this year, but I don’t want to make it sort of a self-fulfilling prophecy that they definitely are,” Hollander said of Anderson and fellow top pitching prospect Ryan Sloan. “I think they’re mature enough and their stuff is good enough. Whatever happens between the time they suit up (for a Mariners minor league) affiliate and the end of the season, a number of factors could come into play there. But I don’t see any reason why they couldn’t do it.”

Anderson was matched against another highly touted left-hander picked in the 2025 first round Friday night in Jamie Arnold, the 11th overall pick and No. 38 prospect in baseball. Arnold was also making his pro debut. He struck out six and allowed two runs on six hits and two walks.

Designated hitter Jared Sundstrom did the damage for Arkansas against Arnold, mashing a two-run home run in the top of the fourth inning.

Left fielder Michael Arroyo, the Mariners’ No. 5 prospect and No. 63 league-wide, also hit a solo home run to left-center field in the eighth inning.

Unfortunately for the Travelers, Midland rallied for five runs in the ninth inning and won 5-4 on a walkoff single.

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