

Introduction
Thad Spencer (born 28 March 1943 – 13 December 2013) was an American heavyweight boxer.
A native of Portland, Oregon, Spencer made his professional boxing debut in May 1960. After building up a 31-5 record, which included wins over contenders Doug Jones, Brian London and Amos Lincoln, he was highly regarded enough to be a part of the eight-man WBA elimination tournament, held after Muhammad Ali had been stripped of the title. Spencer won a 12 round decision over former title-holder Ernie Terrell in August 1967 and was then matched against Jerry Quarry in the semi-finals. Despite entering the bout as a 6/4 favourite, Spencer lost to Quarry by a 12th round TKO.
Spencer lost his next three fights by knockout, to Leotis Martin, Billy Walker and Mac Foster, and was never a serious title contender again. He continued boxing until 1971, though without winning another bout.
Spencer died in his sleep on December 13, 2013 in Valleo, CA.
Spencer's son Todd Spencer was a football star for U.S.C., and played 3 seasons in the N.F.L. for the Steelers and the Chargers.
Professional boxing record
| 32 Wins (14 knockouts, 18 decisions), 13 Losses (7 knockouts, 6 decisions), 1 Draw [1] | |||||||
| Result | Record | Opponent | Type | Round | Date | Location | Notes |
| Loss | 36-9-1 | UD | 10 | 07/06/1971 | 92-99, 95-98, 95-99. | ||
| Loss | 15-0-1 | UD | 10 | 23/04/1971 | |||
| Loss | 15-2-1 | KO | 2 | 05/10/1970 | |||
| Loss | 32-6-1 | UD | 10 | 28/05/1970 | |||
| Draw | 5-4 | PTS | 10 | 18/03/1970 | |||
| Loss | 17-0 | KO | 1 | 20/05/1969 | Spencer knocked out at 3:09 of the first round. | ||
| Loss | 20-7-2 | TKO | 6 | 12/11/1968 | Referee stopped the bout at 2:04 of the sixth round. | ||
| Loss | 25-4 | TKO | 9 | 28/05/1968 | Referee stopped the bout at 2:29 of the ninth round. | ||
| Loss | 25-1-4 | TKO | 12 | 03/02/1968 | WBA World Heavyweight Title Tournament Semi-Finals. | ||
| Win | 39-5 | UD | 12 | 05/08/1967 | WBA World Heavyweight Title Tournament Quarter-Finals. | ||
| Win | 40-10-1 | TKO | 8 | 26/06/1967 | Referee stopped the bout at 2:09 of the eighth round. | ||
| Win | 29-7-1 | UD | 10 | 14/10/1966 | 11-0, 10-0, 8-1. | ||
| Loss | 21-15-1 | TKO | 7 | 13/09/1966 | California Heavyweight Title. Referee stopped the bout at 0:58 of the seventh round. | ||
| Win | 34-12 | PTS | 10 | 02/05/1966 | |||
| Win | 35-6 | RTD | 2 | 18/04/1966 | Bodell did not come out for the third round. | ||
| Win | 20-10-1 | TD | 6 | 21/02/1966 | 2-3, 4-2, 4-2. | ||
| Win | 11-8-2 | UD | 12 | 19/01/1966 | California Heavyweight Title. 6-3, 11-0, 7-1. | ||
| Loss | 34-7-1 | SD | 10 | 22/11/1965 | |||
| Win | 27-8-2 | UD | 12 | 26/04/1965 | California Heavyweight Title. 10-1, 9-3, 12-0. | ||
| Win | 19-7-1 | UD | 10 | 17/03/1965 | 8-2, 8-2, 7-1. | ||
| Win | 9-4-1 | UD | 10 | 22/02/1965 | 6-3, 7-3, 8-1. | ||
| Loss | 28-6-1 | TKO | 9 | 15/12/1964 | Referee stopped the bout at 1:51 of the ninth round. | ||
| Win | 33-8 | KO | 5 | 09/11/1964 | Tom knocked out at 1:39 of the fifth round. | ||
| Win | 18-28 | TKO | 7 | 13/10/1964 | Referee stopped the bout at 1:21 of the seventh round. | ||
| Win | 7-8-2 | KO | 4 | 04/08/1964 | |||
| Win | 18-14-2 | KO | 5 | 05/07/1964 | |||
| Loss | 6-2 | PTS | 10 | 30/11/1963 | |||
| Win | 4-1-3 | TKO | 6 | 12/10/1963 | Referee stopped the bout at 2:04 of the sixth round. | ||
| Win | 17-3 | UD | 10 | 01/08/1963 | 5-3, 5-4, 5-3. | ||
| Win | 17-19-4 | TKO | 9 | 13/05/1963 | |||
| Win | 1-1 | TKO | 5 | 08/04/1963 | Referee stopped the bout at 2:59 of the fifth round. | ||
| Win | 6-1 | UD | 10 | 20/10/1962 | |||
| Win | 9-4-1 | KO | 7 | 09/10/1962 | |||
| Win | 6-0 | PTS | 6 | 10/07/1962 | |||
| Win | 24-11-1 | PTS | 6 | 28/05/1962 | |||
| Win | 17-16 | KO | 2 | 14/04/1962 | |||
| Win | 7-6-2 | PTS | 10 | 14/11/1961 | |||
| Win | 8-15-5 | UD | 10 | 09/09/1961 | |||
| Win | 1-2 | TKO | 2 | 11/07/1961 | Referee stopped the bout at 2:59 of the second round. | ||
| Loss | 17-9-3 | PTS | 4 | 01/07/1961 | |||
| Win | 23-7-1 | UD | 6 | 04/05/1961 | |||
| Win | 19-15-6 | KO | 3 | 10/04/1961 | |||
| Win | 14-22-4 | PTS | 10 | 21/03/1961 | |||
| Win | 27-12-2 | PTS | 8 | 23/01/1961 | |||
| Win | -- | Theo Lolanzo | PTS | 6 | 07/09/1960 | ||
| Win | 13-19-2 | TKO | 3 | 03/05/1960 | |||