ONE · MMA
ONE Welterweight Submission Grappling Championship
Current championGary MackSince 14 Mar 2026Champions
| Champion | Won | Lost | Days |
|---|---|---|---|
| Gary Mack | 14 Mar 2026 | Current | 220 |
| Tye Ruotolo | 6 Apr 2024 | 14 Mar 2026 | 707 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.