37-year-old middleweight Tim Kennedy (18-6-0) took to social media today to announce his retirement from mixed martial arts.

In an emotional Facebook post, Kennedy recalled the emotions of his last fight, a loss against Kelvin Gastelum at Toronto’s UFC 206 and paid tribute to several key friends who helped him along the way to becoming a ranked UFC competitor.

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MMA Crossfire

MMA Crossfire Vault – Tim Kennedy

The 37-year-old Kennedy leaves the UFC with a 3-2-0 record, but had fought only twice since September 2014, mainly due to injuries. The military veteran’s 15-year fighting career started in 2001.

Many UFC fans will likely remember Kennedy for his controversial loss to Yoel Romero and his subsequent confrontation with the Cuban-American afterwards.

Kennedy was a member of the November 2016 formation of the Mixed Martial Arts Association (MMAAA). That may be a reason why Kennedy mentioned in his retirement post that he would like to be part of “growing the sport.”

@kenaiandrews