Jacob Mackenzie, commonly known as Jake Mackenzie, is a Canadian-born jiu-jitsu black belt under Roberto "Cyborg" Abreu who became well-known on the international grappling circuit for his prolific use of the deep half guard position. Despite being from the Northern Hemisphere, Mackenzie competed extensively in Brazil, where he established a family in the early 2010s. While in South America Jake Mackenzie joined GFTeam and became known as one of the top figures in the legendary Rio de Janeiro-based gym.