Yoon Dong-sik (9-10, 5) was born in Seoul, South Korea on August 24, 1972. At the age of 32 years on April 23, 2005, he made his professional MMA debut against Kazushi Sakuraba, losing the fight via 1st-round TKO.
Dong-sik's last fight was a 2nd-round TKO loss to Ikuhisa Minowa at age 45 on September 23, 2017. He retired on a 2-fight losing streak.
Some of Yoon Dong-sik's best fights have been against Melvin Manhoef, Shungo Oyama, Zelg Galesic, Fábio Silva, Tarec Saffiedine and Ryo Takigawa.
Dong-sik has 10 losses on his MMA record.
| # | Date | Opponent | Promotion | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|---|
19 | Sep 23, 2017 45 years 9-10 (5) | Ikuhisa Minowa | MD | 2 | TKO | LOSS Finger injury | |
18 | May 14, 2016 43 years, 8 months 9-9 (5) | Young Choi | MD | 2 | KO | LOSS Punch | |
17 | Jul 25, 2015 42 years, 11 months 9-8 (5) | Daiju Takase | MD | 3 | SD | WIN | |
16 | Nov 9, 2014 42 years, 2 months 8-8 (5) | Amilcar Alves | MD | 3 | UD | WIN | |
15 | Jul 26, 2014 41 years, 11 months 7-8 (5) | Riki Fukuda | MD | 1 | TKO | LOSS Punches | |
14 | Mar 23, 2013 40 years, 6 months 7-7 (5) | Yong-Hwan Jung | LHW | 1 | SUB | WIN Armbar | |
13 | Feb 2, 2013 40 years, 5 months 6-7 (4) | Ryo Takigawa | K-1 | MD | 1 | TKO | WIN Corner stoppage |
12  | Oct 25, 2009 37 years, 2 months 5-7 (3) | 23 years, 1 months 7-1 (5) | Dream | MD | 3 | SD | WIN |
11  | Jul 20, 2009 36 years, 10 months 4-7 (3) | 26 years, 6 months 12-3 (9) | Dream | MD | 1 | TKO | LOSS Foot injury |
10 | Sep 23, 2008 36 years 4-6 (3) | Andrews Nakahara | Dream | MD | 2 | TKO | LOSS Punches |
9  | Jun 15, 2008 35 years, 9 months 4-5 (3) | 22 years, 10 months 21-2-1 (20) | Dream | MD | 2 | UD | LOSS |
8  | Apr 29, 2008 35 years, 8 months 4-4 (3) | 34 years 7-10 (5) | Dream | MD | 2 | UD | WIN |
7  | Oct 28, 2007 35 years, 2 months 3-4 (3) | 25 years, 6 months 10-4 (7) | MD | 1 | SUB | WIN Armbar | |
6  | Sep 17, 2007 35 years 2-4 (2) | 28 years, 7 months 6-2 (6) | MD | 1 | SUB | WIN Armbar | |
5  | Jun 2, 2007 34 years, 9 months 1-4 (1) | 31 years 17-3-1 (16) | K-1 | MD | 2 | SUB | WIN Armbar |
4 | Nov 5, 2006 34 years, 2 months 0-4 (0) | Murilo Bustamante | Pride | WL | 2 | UD | LOSS |
3  | Feb 26, 2006 33 years, 6 months 0-3 (0) | 27 years, 8 months 23-6 (18) | Pride | MD | 3 | UD | LOSS |
2 | Oct 23, 2005 33 years, 1 months 0-2 (0) | Makoto Takimoto | MD | 3 | UD | LOSS | |
1  | Apr 23, 2005 32 years, 7 months 0-1 (0) | 35 years, 9 months 16-8-1 (11) | MD | 1 | TKO | LOSS Punches |
