Reinier de Ridder
(Reinier de)
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Born
1990 (35 years old)
Breda, North BrabantPosition
Fighter
Status
Active
Ethnicity
White
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Height
6'4"
Weight
185 lbs
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FightingTeam
UFC Middleweight
League
UFC
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Yes |  |  |  | UFC 326 Holloway vs Oliveira 2 | 07 Mar 26 | |
 |  | |  | UFC on ABC 9 Whittaker vs de Ridder | 26 Jul 25 | |
| | | | UFC 311 Makhachev vs Moicano | 19 Jan 25 | |
Description
Reinier de Ridder (born September 7, 1990), also known by his initials RdR, is a Dutch professional mixed martial artist. He currently competes in the Middleweight division of the Ultimate Fighting Championship (UFC). He previously competed in ONE Championship, where he is a former ONE Middleweight World Champion and ONE Light Heavyweight World Champion. De Ridder was the third two-division champion in ONE history, having previously held the middleweight and light heavyweight belts simultaneously. As of October 21, 2025, he is #8 in the UFC middleweight rankings.
Background
Reinier de Ridder started with Judo at the age of six and earned a black belt in his teens. After high school he began training in Brazilian Jiu-Jitsu while attending college and became a black belt. He also owns a physical therapy clinic in Breda, combining his working hours with his training hours.
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