how long has sean o'malley been in the ufc

Sean O’Malley has been in the UFC since December 1, 2017, so as of early 2026 he’s been in the promotion for a little over 8 years.

How long he’s been in the UFC

• O’Malley made his official UFC debut on December 1, 2017, at The Ultimate Fighter 26 Finale against Terrion Ware, winning by unanimous decision.

• Counting from December 2017 to January 2026, that puts his UFC tenure at about 8 years and 1–2 months.

So if you’re just looking for a quick answer to “how long has Sean O’Malley been in the UFC,” the answer is: a bit over eight years as of now.

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