10 Youngest MMA Fighters Ever 

10. Nick Diaz (August 2, 1983 – present) Age Debuted: 20 years, 55 days Nationality: American Year Debuted: 2003 Weight: 84 kg.

9. Robbie Lawler (March 20, 1982 – present) Age Debuted: 20 years, 51 days Nationality: American Year Debuted: 2002 Weight: 77 kg.

8. Larissa Pacheco (September 7, 1994 – present) Age Debuted: 20 years, 6 days Nationality: Brazilian Year Debuted: 2014 Weight: 70 kg.

7. Naoki Inoue (June 14, 1997 – present) Age Debuted: 20 years, 3 days Nationality: Japanese Year Debuted: 2017 Weight: 57 kg.

6. Song Yadong (December 2, 1997 – present) Age Debuted: 19 years, 358 days Nationality: Chinese Year Debuted: 2017 Weight: 61 kg.

5. Jake Matthews (August 19, 1994 – present) Age Debuted: 19 years, 313 days Nationality: Australian Year Debuted: 2014 Weight: 77 kg.

4. Vítor Vieira Belfort (April 1, 1977 – present) Age Debuted: 19 years, 312 days Nationality: Brazilian-American Year Debuted: 1997 Weight: 84 kg.

3. Chanmi Jeon (August 28, 1997 – present) Age Debuted: 19 years, 286 days Nationality: South Korean Year Debuted: 2017 Weight: 52 kg.

2. Sage Northcutt (March 1, 1996 – present) Age Debuted: 19 years, 216 days Nationality: American Year Debuted: 2015 Weight: 77 kg.

1. Dan Lauzon (March 30, 1988 – present) Age Debuted: 18 years, 198 days Nationality: American Year Debuted: 2006 Weight: 70 kg.