Osman Diaz losses

Over 11 years as a professional, Osman Diaz has compiled a 10-4 (9) record, fighting across two weight classes. He has four losses.

1. 4. Osman Diaz loses to Ateba Gautier via KO

   On May 9, 2026 Osman Diaz faced Ateba Gautier in a light heavyweight bout. Diaz was 35 years old with a record of 10-3, and Gautier was 24 with a record of 10-1. Diaz was coming off a win and Gautier was on a 9-fight winning streak. Gautier stopped Diaz via TKO in the 2nd round.

2. 3. Osman Diaz loses to Zhang Mingyang via KO

   On November 23, 2024 Osman Diaz faced Zhang Mingyang in a light heavyweight bout. Diaz was 34 years old with a record of 9-2, and Mingyang was 26 with a record of 17-6. Diaz was on a 2-fight winning streak and Mingyang was on a 10-fight winning streak. Mingyang stopped Diaz via TKO in the 1st round.

3. 2. Osman Diaz loses to Joe Pyfer via KO

   On July 26, 2022 Osman Diaz faced Joe Pyfer in a middleweight bout. Diaz was 31 years old with a record of 7-1, and Pyfer was 25 with a record of 8-2. Diaz was on a 5-fight winning streak and Pyfer was coming off a win. Pyfer stopped Diaz via TKO in the 2nd round.

4. 1. Osman Diaz loses to Santiago Diaz via KO in 15 seconds

   On February 15, 2018 Osman Diaz faced Santiago Diaz in a middleweight bout. Diaz was 27 years old with a record of 2-0, and Diaz was 0 with a record of 0-0. Diaz was on an undefeated 2-fight winning streak. Diaz stopped Diaz via TKO in the 1st round.