Mario "The Zen Machine" Sperry (born September 28 ,1966) is a heavyweight martial artist from Brazil. His specialty is Brazilian jiu-jitsu, grappling and ground fighting.

Sperry first broke onto the sport Jiu-Jitsu scene in the early eighties. A protegee of Carlson Gracie, Mario was handed his black belt at the 1995 World Championships of Brazilian Jiu-Jitsu, where he entered and won the heavyweight black belt division, defeating many of the sports greatest legends. Mario won again in 1996, 1997, and 1998. In late 1998 Mario Sperry became the first fighter in history to make a Gracie submit in a match when he defeated World Champion Royler Gracie in Brazil (It should be noted that at the time of his win over Royler Gracie he outweighed Royler by some 70 lbs). He became the first World Submission Grappling Champion, a title he held for three consecutive years.

Sperry has also competed in mixed martial arts, with wins over such fighters as Vernon White and Igor Vovchanchyn. He is also one of the founders of the Brazilian Top Team, where he trained fighters such as Antonio Rodrigo Nogueira "Minotauro", Antonio Rogerio Nogueira, Ricardo Arona, and Paulo Filho, among others.