Seth Kleinbeck
UFC DebutNickname“Mass Destruction”
Record
Streak
L1
Age
Date of birth
- Fighting out of
- Stuttgart
- Born
- United States
- Weight class
- Light Heavyweight
- Height
- 6'2" · 188 cm
Before the UFC
Seth Kleinbeck makes their UFC debut
Our striking, grappling, and schedule metrics are measured from UFC fights, so they come online after this bout. Here is the career they bring in — and how live the opposition has been.
UFC debut
Aug 20, 2026
Pre-UFC opposition
ModerateOpponents' combined record
180-146-2
.552 win rate
Winning-record opponents
7 of 12
carried winning pro records
Pro bouts faced
12
all opponents have records on file
A descriptive read of the non-UFC slate from opponents’ full career pro records — not a UFC-grade Schedule Score.
UFC fight history
No UFC bouts on record yet.
Outside the UFC
across 12 bouts · 11 promotions · wins by 8 KOMR · EliteXC · ShoXC · Strikeforce · ISCF +6
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| L | Kyle Noke22-10-1 | KO/TKO | Doctor Stoppage | R2 | 4:22 | EliteXC | Nov 10, 2007 |
| W | Jaime Jara38-18 | KO/TKO | Punch | R2 | 4:59 | ShoXC | Aug 25, 2007 |
| W | Sam Spengler9-5 | KO/TKO | Punches | R2 | 1:55 | Strikeforce | Jun 22, 2007 |
| L | Liam McCarty13-6 | Decision | — | R3 | 0:00 | ISCF | Dec 16, 2006 |
| W | Trevor Garrett8-13 | KO/TKO | Punches | R1 | — | NLE | Oct 28, 2006 |
| W | Timothy Williams0-14 | KO/TKO | Punches | R1 | 2:54 | DFC 1 | Jun 30, 2006 |
| L | John Kolosci15-9 | Decision | Unanimous | R3 | 5:00 | DC 4 | Jun 17, 2006 |
| W | TJ Worthen0-1 | KO/TKO | Slam | R0 | 0:00 | MR | Feb 18, 2006 |
| W | Lucas Lopes29-20 | KO/TKO | Punches | R1 | 3:12 | FT 5 | Nov 4, 2005 |
| L | Josh Haynes14-11 | Submission | Rear-Naked Choke | R2 | 1:16 | FFC 15 | Sep 14, 2005 |
| W | Ron Fields30-33-1 | KO/TKO | Doctor Stoppage | R1 | 2:04 | MR | Jul 23, 2005 |
| W | Jake Shelton2-6 | KO/TKO | — | R1 | 0:09 | FT 1 | Apr 21, 2005 |
Non-UFC bouts (regional/other promotions) — shown for context only, excluded from Schedule Score, striking/grappling rates, and every UFC-scoped metric.
Amateur
5-0across 5 amateur bouts · 2 promotionsMR · RCF
| Res | Opponent | Outcome | Finish | Rd | Time | Promotion | Date |
|---|---|---|---|---|---|---|---|
| W | Alan Belcher19-9 | KO/TKO | Punches | R1 | 0:15 | RCF | Sep 25, 2004 |
| W | John Cammarata0-1 | KO/TKO | — | R1 | 0:43 | MR | Apr 12, 2003 |
| W | Steve Purdy0-1 | KO/TKO | Lost Teeth | R2 | 0:00 | MR | Mar 2, 2002 |
| W | Decision | — | R0 | 0:00 | MR | Jul 27, 2001 | |
| W | Chris Gillin0-1 | N/A | — | R0 | 0:00 | MR | Apr 7, 2001 |
Amateur (pre-professional) bouts — shown for context only and excluded from the professional record and every UFC-scoped metric.