Standout achievements
Billy Duncan is an American mixed martial artist with a professional record of 5-0 across 5 bouts. They've won 2 by KO/TKO, 2 by submission and 1 by decision — a 80 % finish rate. Most wins come by KO/TKO. Currently on a 5-fight win streak. Last competed January 2026 (active). Has fought most often in United States (5 bouts).
Fight locations (2 venues)
Career timeline — fights by year
Frequently asked
What is Billy Duncan's MMA record?
Billy Duncan has a professional MMA record of 5-0 — 2 wins by KO/TKO, 2 by submission, 1 by decision.
How does Billy Duncan usually win?
They most often win by KO/TKO (2 of 5 wins).
Is Billy Duncan still active?
Billy Duncan last competed in January 2026, and is considered active (no bout in over two years).
What is Billy Duncan's fastest finish?
KO/TKO of Jamison Hartweger in 0:47 (Rd 1) at Shamrock FC 360 - St. Charles.
Where is Billy Duncan from?
Billy Duncan is a American mixed martial artist.
What is Billy Duncan's longest MMA win streak?
Billy Duncan's longest winning run on record is 5 straight victories.