Brett Matthew Kostern
Professional grappling record · 2021–2021
As of 2026-08-18, Brett Matthew Kostern holds a professional record of 1–0 in the Grappling Index database.
1–0Record (W–L)
1630Gi rating ±298
1630Peak rating (2021)
Recent matches
| Year | R | Opponent | Method | Event |
|---|---|---|---|---|
| 2021 | W | Valor Boyer | — | Charleston Summer International Open … |