Submission Underground 28 is an action-packed MMA event that took place on October 31, 2021, in Portland, Oregon. Featuring ten thrilling fights, this event showcased some of the most talented athletes in the sport. Fans gathered to witness intense grappling, skillful techniques, and unforgettable moments inside the cage. With Submission Underground's reputation for high-energy events, Submission Underground 28 was a must-see for all MMA enthusiasts in the Portland area.