Mariners' Bryan Woo Could Get $55 Million Contract Extension

Seattle's young pitching rotation could lead to big deals for Woo and Logan Gilbert.

Mar. 29, 2026 at 2:35pm

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According to MLB Trade Rumors, the Seattle Mariners could sign pitcher Bryan Woo to a four-year, $55 million contract extension. The report compares Woo's potential deal to recent extensions for pitchers like Tanner Bibee and Christian Javier. The Mariners may also look to extend ace Logan Gilbert for as much as $90 million over four years, based on comparisons to pitchers like Pablo Lopez, Mitch Keller, and Garrett Crochet.

Why it matters

The Mariners have built an impressive young pitching rotation, led by Woo and Gilbert. Locking up these starters long-term would help solidify Seattle's roster and give the team a strong foundation for the future, but it will also require significant financial commitments.

The details

MLB Trade Rumors' AJ Eustace broke down potential contract extensions for Woo and Gilbert. For Woo, a four-year, $55 million deal ($13.75 million AAV) was projected, comparing him to pitchers like Tanner Bibee and Christian Javier. For Gilbert, an even larger four-year, $90 million contract ($22.5 million AAV) was estimated, based on comparisons to Pablo Lopez, Mitch Keller, and Garrett Crochet.

  • Woo has close to three years of MLB service time.
  • Bibee signed a four-year, $47.2 million extension in March 2025 after 6.3 fWAR over 56 starts in 2023-24.

The players

Bryan Woo

A young starting pitcher for the Seattle Mariners.

Logan Gilbert

The ace of the Mariners' pitching rotation.

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What they’re saying

“More recently, Bibee got around $47.2MM on a four-year extension in March 2025, which covered at least one free agent year. That came following a 2023-24 stretch in which Bibee accumulated 6.3 fWAR over 56 starts. Being a full-time starter, Woo is a closer match with Bibee's contract than Javier's.”

— AJ Eustace, MLB Trade Rumors writer

What’s next

The Mariners will need to decide in the coming months whether to offer contract extensions to Woo and Gilbert, and at what terms, in order to lock up their young pitching core.

The takeaway

The Mariners' impressive development of young pitching talent has put them in a position to make significant long-term investments in their rotation. Extending Woo and Gilbert would solidify the team's future, but it will also require major financial commitments that the organization will have to carefully consider.