Not Linden Ashby, who played Johnny Cage in the 1995 Mortal Kombat film. No, the guy in the viral Mortal Kombat film that recently popped up online.
The actor who was Johnny Cage in the viral clip is Matt Mullins. He's not only an actor, but an accomplished martial artist. He's a black belt in shorei-ryu karate. For the past ten years, Mullins has been performing "Xtreme Martial Arts", which he describes as a more visual style of the sport.
N4G image used in this post courtesy of RipTen. Source changed to Kotaku because they conducted the actual full interview.