| J. B. Williamson | |
| Realname: | James Bennett Williamson |
| Weight: | |
| Height: | 6 ft 1+1/2 in |
| Reach: | 78 in |
| Birth Date: | December 18, 1956 |
| Birth Place: | Indianapolis, Indiana, U.S. |
| Style: | Orthodox |
| Total: | 43 |
| Wins: | 26 |
| Ko: | 10 |
| Losses: | 16 |
| Draws: | 0 |
| No Contests: | 1 |
James Bennett Williamson (born December 18, 1956) is an American former professional boxer who held the World Boxing Council (WBC) light heavyweight title in 1985.
Williamson turned pro in 1979 after a successful amateur career and won the Vacant WBC Light Heavyweight Title in 1985 in a decision over Prince Mama Mohammed.[1] He lost the title in his first defense against Dennis Andries. Although he never challenged again for another major title, he moved up to heavyweight and continued fighting until 1995, losing matches against notable heavyweights Henry Akinwande, Peter McNeeley, Jimmy Thunder, and George Foreman.[2]
| Result | Record | Opponent | Type | Round, time | Date | Location | Notes | ||
|---|---|---|---|---|---|---|---|---|---|
| 43 | Loss | 26–16 |  Keith McKnight | | |||||
| 42 | Loss | 26–15 | Peter McNeeley | | |||||
| 41 | Loss | 26–14 | Peter McNeeley | | |||||
| 40 | Loss | 26–13 | Bobby Crabtree | | |||||
| 39 | Loss | 26–12 | James Heath | | |||||
| 38 | Loss | 26–11 | Kenny Keene | | |||||
| 37 | Loss | 26–10 |  Alexander Zolkin | | |||||
| 36 | Loss | 26–9 | Art Tucker | | |||||
| 35 | Loss | 26–8 |  Henry Akinwande | | |||||
| 34 | Loss | 26–7 | Pierre Coetzer | | |||||
| 33 | Loss | 26–6 |  Jimmy Thunder |  | |||||
| 32 | Win | 26–5 | Cleveland Woods | | |||||
| 31 | Win | 25–5 | Gary Steiger | | |||||
| 30 | Win | 24–5 | Danny Blake | | |||||
| 29 | NC | 23–5 | Dicky Ryan | | |||||
| 28 | Loss | 23–5 | George Foreman | | |||||
| 27 | Win | 23–4 | Eddie Blevins | | |||||
| 26 | Loss | 22–4 | Jesse Shelby | | |||||
| 25 | Loss | 22–3 |  Juan Roldán | | |||||
| 24 | Loss | 22–2 | Dennis Andries | | |||||
| 23 | Win | 22–1 |  Prince Mama Mohammed | | |||||
| 22 | Win | 21–1 | Grover Robinson | | |||||
| 21 | Win | 20–1 | Jimmy Bills | | |||||
| 20 | Win | 19–1 | Grover Robinson | | |||||
| 19 | Win | 18–1 | Chris Schwenke | | |||||
| 18 | Win | 17–1 | Pete McIntyre | | |||||
| 17 | Win | 16–1 | James Salerno | | |||||
| 16 | Win | 15–1 | James Williams | | |||||
| 15 | Win | 14–1 | Dale Grant | | |||||
| 14 | Loss | 13–1 | Alex Ramos | | |||||
| 13 | Win | 13–0 | Murray Sutherland | | |||||
| 12 | Win | 12–0 | Lee Burkey | | |||||
| 11 | Win | 11–0 | Raham Muhammed | | |||||
| 10 | Win | 10–0 | Ted Sanders | | |||||
| 9 | Win | 9–0 |  Antonio Adame | | |||||
| 8 | Win | 8–0 | Antonio Adame | | |||||
| 7 | Win | 7–0 | Jamie Thomas | | |||||
| 6 | Win | 6–0 | Lander Clark | | |||||
| 5 | Win | 5–0 | Danny Kirk | | |||||
| 4 | Win | 4–0 |  Jose Martinez | | |||||
| 3 | Win | 3–0 | Ernie Rabotte | | |||||
| 2 | Win | 2–0 | Mike Hickman | | |||||
| 1 | Win | 1–0 | Dennis Mancino | |
!colspan=3 style="background:#C1D8FF;"| Regional boxing titles