Kim Dong-hyun (Korean: 김동현, 金東炫; born September 9, 1988), anglicized as Dong Hyun Kim, also known as "The Maestro", is a South Korean mixed martial artist who most recently competed in the UFC's lightweight division.
In his second bout for the promotion, Ma faced Polo Reyes on June 4, 2016, at UFC 199.
[6] In his third fight for the promotion, Ma faced Brendan O'Reilly on December 3, 2016, at The Ultimate Fighter: Tournament of Champions Finale.
Ma won the fight by unanimous decision to earn his first UFC victory.
[13] He lost the fight via TKO due to a doctor stoppage between the second and third round as the swelling on Ma's right eye rendered him unable to continue.