-
1
- Emelianenko vs. Werdum
- Fabrício Werdum | Submission | Round 1
- 2010 | Strikeforce
-
Fedor's 1st real loss.
-
2
- Serra vs. St-Pierre I
- Matt Serra | KO/TKO | Round 1
- 2007 | UFC 69
-
Would be 1st, but this didn't end GSP's legacy like Wedurm did to Fedor.
-
3
- Silva vs. Weidman
- Chris Weidman | KO/TKO | Round 2
- 2013 | UFC 162
-
4
- Lauzon vs. Pulver
- Joe Lauzon | KO/TKO | Round 1
- 2006 | UFC 63
-
5
- Gonzaga vs. Filipović
- Gabriel Gonzaga | KO/TKO | Round 1
- 2007 | UFC 70
-
6
- Sokoudjou vs. Nogueira
- Rameau Thierry Sokoudjou | KO/TKO | RD 1
- 2007 | Pride 33
-
7
- Penn vs. Edgar I
- Frankie Edgar | Decision
- 2010 | UFC 112
-
8
- Penn vs. Hughes I
- BJ Penn | Submission | Round 1
- 2004 | UFC 46
-
9
- Griffin vs. Rua I
- Forrest Griffin | Submission | Round 3
- 2007 | UFC 76
-
10
- Randleman vs. Filipović I
- Kevin Randleman | KO/TKO | Round 1
- 2004 | Pride Total Elimination 2004
-
11
- Souza vs. Rockhold
- Luke Rockhold | Decision | Strikeforce
-
12
- Ortiz vs. Bader
- Tito Ortiz | Submission | Round 1 | UFC 132
-
13
- Thiago vs. Koscheck
- Paulo Thiago | KO/TKO | Round 1 | UFC 95
-
14
- Chonan vs. Silva
- Ryo Chonan | Submission | Round 3 | Pride Shockwave 2004
-
15
- Alexander vs. Jardine
- Houston Alexander | KO/TKO | Round 1 | UFC 71
-
16
- Lawal vs. Newton
- Emanuel Newton | KO/TKO | Round 1 | Bellator 90
-
17
- Duffee vs. Russow
- Mike Russow | KO/TKO | Round 3 | UFC 114
-
18
- Couture vs. Sylvia
- Randy Couture | Decision | UFC 68
-
19
- dos Santos vs. Werdum
- Junior dos Santos | KO/TKO | Round 1 | UFC 90
-
20
- Brown vs. Faber I
- Mike Brown | KO/TKO | Round 1 | WEC 36
-
21
- Pulver vs. Penn I
- Jens Pulver | Decision | UFC 35
-
22
- Couture vs. Liddell I
- Randy Couture | KO/TKO | Round 3 | UFC 43
-
23
- Diaz vs. Gomi
- Fight Ends in a No Contest | Pride 33
-
24
- Torres vs. Bowles
- Brian Bowles | KO/TKO | Round 1 | WEC 42
-
25
- Story vs. Brenneman
- Charlie Brenneman | Decision | UFC on Versus 4
-
26
- Emelianenko vs. Silva
- Antônio Silva | KO/TKO | Round 2 | Strikeforce
-
27
- Liddell vs. Evans
- Rashad Evans | KO/TKO | Round 2 | UFC 88
-
28
- Slice vs. Petruzelli
- Seth Petruzelli | KO/TKO | Round 1 | EliteXC
-
29
- Penn vs. Edgar II
- Frankie Edgar | Decision | UFC 118
-
30
- Griffin vs. Jackson
- Forrest Griffin | Decision | UFC 86
-
31
- Sokoudjou vs. Arona
- Rameau Thierry Sokoudjou | KO/TKO | RD 1 | Pride 34
-
32
- Yamamoto vs. Warren
- Joe Warren | Decision | Dream 9
-
33
- Cruz vs. Mir
- Marcio Cruz | KO/TKO | Round 1 | UFC 57
-
34
- Chandler vs. Pitbull
- Michael Chandler | Decision | Bellator 44
-
35
- Alves vs. Story
- Rick Story | Decision | UFC 130
-
36
- Hansen vs. Aoki II
- Joachim Hansen | KO/TKO | Round 1 | Dream 5
-
Completely forgot about this fight.. it was a HUGE upset back in the day.
-
37
- Grispi vs. Roop
- George Roop | KO/TKO | Round 3 | The Ultimate Fighter 13 Finale
-
38
- Omigawa vs. Elkins
- Darren Elkins | Decision | UFC 131
-
39
- Robichaux vs. Mackles
- Jonathan Mackles | Submission | Round 1 | Legacy FC 7
-
40
- Warren vs. Vila
- Alexis Vila | KO/TKO | Round 1 | Bellator 51
-
41
- Curran vs. Sandro
- Pat Curran | KO/TKO | Round 2 | Bellator 48
-
42
- Vémola vs. Markes
- Ronny Markes | Decision | UFC on Versus 5
-
This was a decent upset imo.
-
43
- Fitch vs. Hendricks
- Johny Hendricks | KO/TKO | Round 1 | UFC 141
-
44
- Shields vs. Ellenberger
- Jake Ellenberger | KO/TKO | Round 1 | UFC Fight Night 25
-
45
- Guillard vs. Lauzon
- Joe Lauzon | Submission | Round 1 | UFC 136
-
46
- Alvarez vs. Chandler
- Michael Chandler | Submission | Round 4 | Bellator 58
-
47
- Nogueira vs. Schaub
- Antônio Rodrigo Nogueira | KO/TKO | RD 1 | UFC 134
-
I'll add this fight b/c it could signal Nogueira's resurgence.
-
48
- Machida vs. Rua II
- Maurício Rua | KO/TKO | Round 1 | UFC 113
-
49
- Okami vs. Boetsch
- Tim Boetsch | KO/TKO | Round 3 | UFC 144
-
50
- Rosholt vs. Lewis
- Derrick Lewis | KO/TKO | Round 2 | Legacy FC 13
-
51
-
52
- Henderson vs. Shields
- Jake Shields | Decision | Strikeforce
-
53
- Jardine vs. Liddell
- Keith Jardine | Decision | UFC 76
-
54
- Barboza vs. Varner
- Jamie Varner | KO/TKO | Round 1 | UFC 146
-
55
-
56
- Takase vs. Silva
- Daiju Takase | Submission | Round 1 | Pride 26
-
57
- Marquardt vs. Saffiedine
- Tarec Saffiedine | Decision | Strikeforce
-
58
- Lambert vs. Sobral
- Jason Lambert | KO/TKO | Round 2 | UFC 68
-
59
- Hominick vs. Yagin
- Eddie Yagin | Decision | UFC 145
-
60
- Philippou vs. Carmont
- Francis Carmont | Decision | UFC 165