The Seattle Mariners have officially approved a sweeping $1.5 billion stadium renovation project, set to begin in early 2025, ushering in a bold new era for the franchise known as the Green Machine and its devoted fanbase.
After months of negotiations with local authorities, private investors, and the Washington State Stadium Authority, the Mariners’ ownership group received unanimous approval late Sunday night to move forward with the largest capital investment in team history.
โThis isnโt just about baseball. Itโs about building a future,โ said Mariners CEO Catie Griggs in a press release Monday morning. โWeโre creating a world-class venue for a world-class fan base. The new T-Mobile Park will be a symbol of pride for Seattle for generations to come.โ
Project Highlights
The multi-phase renovation will modernize nearly every corner of T-Mobile Park, while preserving the iconic views of the Puget Sound and downtown skyline. Key features include:
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Fully retractable transparent roof with climate control
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Expanded seating capacity from 47,000 to 52,000
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A 360-degree concourse with elevated fan experiences
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State-of-the-art training and recovery facilities
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GreenTech upgrades including solar panel roofing and rainwater reclamation
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A new โLegends Rowโ museum celebrating Mariners greats like Ken Griffey Jr., Edgar Martinez, Ichiro Suzuki, and Felix Hernandez
ย Timeline
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Demolition & Prep Work: Begins Q1 2025 (offseason)
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Phase I Completion: By Opening Day 2026 (lower bowl & player facilities)
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Final Completion: Late 2027 (upper deck, exterior, retail district)
The team has confirmed that no games will be relocated during construction, with upgrades phased to ensure T-Mobile Park remains operational throughout.
ย Fan Reactions & League Praise
Mariners fans flooded social media with excitement, with #NewGreenMachine trending within hours.
โFrom Ken Griffey to Julio Rodrรญguez โ now we finally have a ballpark worthy of our legends,โ one fan wrote on X (formerly Twitter).
MLB Commissioner Rob Manfred also praised the initiative:
โSeattle is a cornerstone city in Major League Baseball. These renovations reflect the franchiseโs commitment to excellence both on and off the fie

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