| Fighter | Walt Harris |
| Nationality | American |
| Height | 6 ft 5 in (196 cm) |
| Weight | 264 lb (120 kg; 18 st 12 lb) |
| Division | Heavyweight |
| Reach | 77 in (196 cm)[1] |
| Walt Harris Career Earnings | $901,000 |
| 24 matches | 13 wins | 10 losses, |
| By knockout | 13 | 5, |
| By submission | 0 | 1, |
| By decision | 0 | 3, |
| By disqualification | 0 | 1, |
| No contests | 1 | , |
| Res. | Record | Opponent, | Method | Event | Fight Video | Fight Highlights | Salary | Twitter Reactions |
| Loss | 13–10 (1) | Marcin Tybura, | TKO (punches) | UFC Fight Night: Rozenstruik vs. Sakai | Fight Video | Fight Highlights | $91,000 | Reactions |
| Loss | 13–9 (1) | Alexander Volkov, | TKO (body kick and punches) | UFC 254 | Fight Video | Fight Highlights | $85,000 | Reactions |
| Loss | 13–8 (1) | Alistair Overeem, | TKO (punches) | UFC on ESPN: Overeem vs. Harris | Fight Video | Fight Highlights | $85,000 | Reactions |
| Win | 13–7 (1) | Aleksei Oleinik, | KO (knee and punches) | UFC on ESPN: dos Anjos vs. Edwards | Fight Video | Fight Highlights | $164,000 | Reactions |
| Win | 12–7 (1) | Sergey Spivak, | TKO (punches) | UFC Fight Night: Iaquinta vs. Cowboy | Fight Video | Fight Highlights | $148,000 | Reactions |
| NC | 11–7 (1) | Andrei Arlovski, | NC (overturned by CSAC) | UFC 232 | Fight Video | Fight Highlights | $78,000 | Reactions |
| Win | 11–7 | Daniel Spitz, | KO (punches) | UFC Fight Night: Rivera vs. Moraes | Fight Video | Fight Highlights | $61,000 | Reactions |
| Loss | 10–7 | Mark Godbeer, | DQ (illegal kick) | UFC 217 | Fight Video | Fight Highlights | $33,000 | Reactions |
| Loss | 10–6 | Fabrício Werdum, | Submission (armbar) | UFC 216 | Fight Video | Fight Highlights | $33,000 | Reactions |
| Win | 10–5 | Cyril Asker, | TKO (punches and elbows) | UFC Fight Night: Holm vs. Correia | Fight Video | Fight Highlights | $33,000 | Reactions |
| Win | 9–5 | Chase Sherman, | KO (knee and punches) | UFC Fight Night: Rodríguez vs. Penn | Fight Video | Fight Highlights | $29,000 | Reactions |
| Loss | 8–5 | Shamil Abdurakhimov, | Decision (split) | UFC Fight Night: Lineker vs. Dodson | Fight Video | Fight Highlights | $14,500 | Reactions |
| Win | 8–4 | Cody East, | TKO (punches) | UFC 197 | Fight Video | Fight Highlights | $22,500 | Reactions |
| Loss | 7–4 | Soa Palelei, | TKO (punches) | UFC Fight Night: Rockhold vs. Bisping | Fight Video | Fight Highlights | $8,000 | Reactions |
| Win | 7–3 | D.J. Linderman, | KO (punches) | Titan FC 28 | Fight Video | Fight Highlights | $8,000 | Reactions |
| Loss | 6–3 | Nikita Krylov, | TKO (head kick and punches) | UFC on Fox: Henderson vs. Thomson | Fight Video | Fight Highlights | $8,000 | Reactions |
| Loss | 6–2 | Jared Rosholt, | Decision (unanimous) | The Ultimate Fighter: Team Rousey vs. Team Tate Finale | Fight Video | Fight Highlights | – | Reactions |
| Win | 6–1 | Tony Melton, | TKO (punches) | Strike Hard Productions 24 | Fight Video | Fight Highlights | – | Reactions |
| Win | 5–1 | Josh Robertson, | TKO (punches) | Strike Hard Productions 20 | Fight Video | Fight Highlights | – | Reactions |
| Win | 4–1 | Anthony Hamilton, | KO (punches) | Superior Cage Combat 4: Grove vs. Silva | Fight Video | Fight Highlights | – | Reactions |
| Win | 3–1 | Cedric James, | KO (punches) | Fight Time 7: The Return | Fight Video | Fight Highlights | – | Reactions |
| Win | 2–1 | Wes Little, | KO (punch) | Fight Force International: Blood & Sand 9 | Fight Video | Fight Highlights | – | Reactions |
| Loss | 1–1 | Chris Barnett, | Decision (unanimous) | World Extreme Fighting 46 | Fight Video | Fight Highlights | – | Reactions |
| Win | 1–0 | Justin Thornton, | TKO (punches) | Hess Extreme Fighting | Fight Video | Fight Highlights | – | Reactions |
