Just when you thought baseball season couldn’t get any weirder, louder, or more anime-infused, Toei Animation has decided to once again sail headfirst into the Pacific Northwest. Fresh off last year’s wildly successful crossover experiment, the legendary anime studio is returning to Seattle this spring for round two of its ONE PIECE collaboration with the Seattle Mariners, because apparently this city proved it could responsibly handle pirates, baseball, and fandom in the same building.
On Tuesday, March 31, 2026, Monkey D. Luffy and the Straw Hat Crew will temporarily abandon the Grand Line and dock at T-Mobile Park for Seattle Mariners x ONE PIECE Night, perfectly timed with the Mariners’ matchup against the New York Yankees. That’s right—America’s most traditional baseball franchise versus anime’s most aggressively untraditional pirate crew, all under one retractable roof.
Toei Animation, clearly pleased that last year’s event didn’t result in chaos or Devil Fruit-related incidents, sounded downright thrilled to be back. Lisa Yamatoya, Senior Director and Head of Marketing for Toei Animation Inc., said the company had no choice but to return after the “tremendous response” to last year’s collaboration, which is corporate-speak for “fans lost their minds and bought everything.”
Tickets for Mariners x ONE PIECE Night are available now exclusively through mariners.com/onepiece, and yes, they are expected to sell out again—because nothing motivates anime fans quite like limited-edition merch. Every theme ticket holder will receive a commemorative ONE PIECE x Seattle Mariners baseball jersey, allowing fans to finally answer the question: “What if a pirate crew really committed to America’s pastime?”
The event schedule kicks off early for the truly dedicated. Festivities begin at Victory Hall at 2:30 PM, where fans can try out the ONE PIECE Card Game and pick up their commemorative jerseys. Jersey distribution wraps up at 4:30 PM, card game demos end at 5:00 PM, and gates open at 5:10 PM back at T-Mobile Park. For anyone who missed the earlier pickup window, jersey distribution resumes outside Section 339 and runs through the end of the third inning—because even pirates understand grace periods.
First pitch between the Mariners and Yankees is scheduled for 6:40 PM, at which point the anime fandom and baseball purists will briefly set aside their differences to agree that at least everyone hates the Yankees.
For the uninitiated, One Piece is based on the globally beloved and best-selling manga of all time created by Eiichiro Oda. The series follows Luffy and his crew on a decades-long quest to find the legendary treasure known as the One Piece, previously owned by Gol D. Roger, former King of the Pirates. Since debuting on Japanese television in 1999, the franchise has grown into a pop-culture juggernaut spanning over 25 years, 15 feature films, multiple video games, a trading card game, and enough merchandise to sink a small island.
As if that weren’t enough, ONE PIECE is also gearing up for a major anime moment this April with the premiere of its highly anticipated Elbaph arc, proving that even after two and a half decades, this pirate ship is very much still sailing. Toei Animation continues to produce and distribute subtitled and dubbed versions of the series across North America, Latin America, South Africa, Australia, and New Zealand, ensuring that no corner of the globe is safe from Straw Hat fever.
So yes, anime pirates are back at a Major League Baseball stadium, jerseys will sell out instantly, and Seattle will once again be the city that casually hosts ONE PIECE nights like it’s completely normal. Honestly? At this point, it kind of is.
Fans can purchase tickets now for Seattle Mariners X ONE PIECE Night exclusively at mariners.com/onepiece.
