Heavyweights will collide in “Rain City.”
MMAmania.com confirmed with multiple sources today (Thurs., Jan. 8, 2026) that No. 10-ranked Ultimate Fighting Championship (UFC) Heavyweight Marcin Tybura will take on surging Brazilian prospect Valter Walker at UFC Seattle on Sat., March 28, 2026, inside Climate Pledge Arena in Seattle, Washington.
Walker confirmed the was fighting in Seattle on Instagram.
Walker (15-1) stumbled out of the gate in his UFC debut, suffering a loss to Lukasz Brzeski in 2024. Since then, however, “Clean Monster” has completely rewritten the narrative — and the UFC record books.
But he wasn’t finished.
At UFC 321 in Oct. 2025, Walker once again locked in a first-round heel hook — this time against Louie Sutherland — tying Rousimar Palhares for the most heel hook submissions (four) in UFC history while extending his own record for consecutive heel hook finishes (watch it).
A win in Seattle would almost certainly vault Walker into the Top 10 of the Heavyweight rankings.
Tybura (27-10), meanwhile, will be defending his No. 10 spot when he steps into the cage. The Polish veteran went 1-1 in 2025, handing highly touted U.K. prospect Mick Parkin his first professional loss at UFC London before suffering a quick knockout loss to debuting Ante Delija at UFC Paris (watch highlights), snapping a two-fight win streak.
Now 40 years old, Tybura is 5-3 over his last eight appearances.
Here are some other bouts currently scheduled for UFC Seattle:
Casey O’Neill vs. Gabriella Fernandes
Alexa Grasso vs. Maycee Barber
Nicolle Caliari vs. Carol Fiori
