Rare footage of John Kavanagh, the head coach of UFC Lightweight Champion Conor McGregor, competing in MMA has been released.

In the video below, you can watch Kavanagh dominate in one of his few MMA fights.

In 2002, Kavanagh fought Tamel Hasar. The Irishman didn’t take long to submit his opponent with a rear-naked choke.

Kavanagh has not fought in MMA since 2003. Since then, he has turned his focus to coaching and is responsible for coaching one of the most popular fighters in UFC history.

With Kavanagh by his side, McGregor has won two different UFC championships and is currently one of the best pound-for-pound fighters in the world.

Kavanagh is currently coaching McGregor as he prepares for the biggest fight of his career.

Next month, McGregor will make his professional boxing debut. His first boxing match will be against boxing icon Floyd “Money” Mayweather.

Mayweather vs. McGregor will take place Aug. 26 at the T-Mobile Arena in Las Vegas.