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]

No.	Result	Record	Opponent	Type	Round, time	Date	Location	Notes
43	Loss	26–16 (1)	Keith McKnight	TKO	1 (10)	1995-12-02	Lavergne
42	Loss	26–15 (1)	Peter McNeeley	TKO	1 (8)	1994-10-08	Whitman Armory, Whitman
41	Loss	26–14 (1)	Peter McNeeley	RTD	2 (8)	1994-06-24	Foxborough Raceway, Foxborough
40	Loss	26–13 (1)	Bobby Crabtree	KO	5 (8)	1994-04-08	Fort Smith
39	Loss	26–12 (1)	James Heath	TKO	3 (8)	1994-02-19	Coliseum, Charlotte
38	Loss	26–11 (1)	Kenny Keene	TKO	4 (10)	1993-07-23	Hawks Memorial Stadium, Boise
37	Loss	26–10 (1)	Alexander Zolkin	TKO	4 (10)	1993-06-12	Columbus
36	Loss	26–9 (1)	Art Tucker	TKO	5 (10)	1991-05-09	Newark
35	Loss	26–8 (1)	Henry Akinwande	TKO	2 (8)	1991-03-06	Wembley Arena, Wembley
34	Loss	26–7 (1)	Pierre Coetzer	PTS	10 (10)	1990-11-08	Biloxi
33	Loss	26–6 (1)	Jimmy Thunder	TKO	10 (10)	1990-07-14	Jupiters Hotel & Casino, Broadbeach
32	Win	26–5 (1)	Cleveland Woods	UD	8 (8)	1990-05-24	Bally's Las Vegas, Las Vegas
31	Win	25–5 (1)	Gary Steiger	TKO	6 (10)	1990-04-21	Mackin Hall, Louisville
30	Win	24–5 (1)	Danny Blake	UD	4 (4)	1989-12-07	Louisville
29	NC	23–5 (1)	Dicky Ryan	ND	4 (4)	1989-09-26	Sherwood Club, Indianapolis
28	Loss	23–5	George Foreman	TKO	5 (10)	1989-04-30	Moody Center, Galveston
27	Win	23–4	Eddie Blevins	KO	1 (8)	1989-03-18	Bedford Middle School, Bedford
26	Loss	22–4	Jesse Shelby	TKO	8 (10)	1986-11-18	The Forum, Inglewood
25	Loss	22–3	Juan Roldán	PTS	10 (10)	1986-10-18	Estadio Luna Park, Buenos Aires
24	Loss	22–2	Dennis Andries	SD	12 (12)	1986-04-30	Picketts Lock Stadium, Edmonton	Lost WBC light heavyweight title
23	Win	22–1	Prince Mama Mohammed	UD	12 (12)	1985-12-10	The Forum, Inglewood	Won vacant WBC light heavyweight title
22	Win	21–1	Grover Robinson	UD	12 (12)	1985-09-18	The Forum, Inglewood
21	Win	20–1	Jimmy Bills	UD	10 (10)	1985-07-22	The Forum, Inglewood
20	Win	19–1	Grover Robinson	UD	12 (12)	1985-04-22	The Forum, Inglewood
19	Win	18–1	Chris Schwenke	UD	12 (12)	1985-01-16	Riviera Hotel & Casino, Las Vegas
18	Win	17–1	Pete McIntyre	SD	10 (10)	1984-10-10	The Forum, Inglewood
17	Win	16–1	James Salerno	TKO	3 (10)	1984-07-09	The Forum, Inglewood
16	Win	15–1	James Williams	TKO	7 (10)	1984-04-24	Veterans Memorial Coliseum, Culver City
15	Win	14–1	Dale Grant	TKO	9 (10)	1984-03-27	Country Club, Reseda
14	Loss	13–1	Alex Ramos	UD	10 (10)	1983-05-01	Sands Casino Hotel, Atlantic City
13	Win	13–0	Murray Sutherland	MD	10 (10)	1982-12-10	Caesars Palace, Sports Pavilion, Las Vegas
12	Win	12–0	Lee Burkey	UD	8 (8)	1981-09-15	Caesars Tahoe, Stateline
11	Win	11–0	Raham Muhammed	UD	8 (8)	1981-05-10	The Forum, Inglewood
10	Win	10–0	Ted Sanders	UD	10 (10)	1980-11-29	Olympic Auditorium, Los Angeles
9	Win	9–0	Antonio Adame	KO	6 (8)	1980-09-27	The Forum, Inglewood
8	Win	8–0	Antonio Adame	UD	10 (10)	1980-06-19	U. of Puget Sound Fieldhouse, Tacoma
7	Win	7–0	Jamie Thomas	UD	10 (10)	1980-06-14	Riverfront Coliseum, Cincinnati
6	Win	6–0	Lander Clark	TKO	6 (6)	1980-05-04	Seattle Center Coliseum, Seattle
5	Win	5–0	Danny Kirk	TKO	1 (6)	1980-03-28	U. of Puget Sound Fieldhouse, Tacoma
4	Win	4–0	Jose Martinez	KO	2 (6)	1980-03-09	Civic Center, Saint Paul
3	Win	3–0	Ernie Rabotte	UD	6 (6)	1980-01-26	Sports Arena, Los Angeles
2	Win	2–0	Mike Hickman	KO	1 (4)	1979-11-27	Sports Arena, Los Angeles
1	Win	1–0	Dennis Mancino	UD	4 (4)	1979-10-27	Sports Arena, Los Angeles	Professional debut

• List of world light-heavyweight boxing champions

• Boxing record for J. B. Williamson from BoxRec (registration required)