Xander Sei Williamsen
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2 GoldNAGA 2Fighter Intelligence
2 TournamentsGet notified when Xander Sei Williamsen's rankings update
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Maleblue BeltAges 16-187,098 FightersRanked #1205 of 7,098 blue belts. 60% win rate across 10 matches.
Fighter History
| Result | Fighter | JITS | Video |
|---|---|---|---|
| W | 1379+760 | ||
| L | 2502-850 | ||
| W | 2432+1990 | ||
| W | 2598+780 | ||
| W | 2432+630 | ||
| L | 2432-260 | ||
| W | 2432+820 | ||
| L | 2432-840 | ||
| W | 2432+490 | ||
| L | 2432-770 |
From Easton BJJ
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Stats verified from completed tournaments only, may not represent a fighter's true record.
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About
Xander Sei Williamsen is a Blue belt from Easton BJJ (NM) and 4 gold medals across 4 tournaments. His 75% gold rate significantly outpaces the 45% belt average, placing him in the 87th percentile among Blue belts. With a JITS Rating of 2437 and #215 global belt rank, Williamsen competes at the Veteran tier despite debuting in 2025. Williamsen's 6 competitive wins came entirely against higher-rated opponents, including a notable victory over Ben Moore (−514 point gap).
His Development Velocity Index registers +268.0 points per month, ranking in the 89th percentile for momentum. All 10 of his matches have occurred in NAGA competition, with a 60% win rate and 50% submission rate that trails the 54% belt average by 4 points. The gi format shows his strength: 8 gi matches at a 3570 rating versus 8 no-gi matches at 1040 rating.