Since then, they have remained successful in Brazilian football, having won 7 Campeonato Brasileiro Srie A, the 1987 Copa Unio, 4 Copa do Brasil, and a record 37 Campeonato Carioca.

Krav Maga's emphasis on real-world self-defense and potentially lethal techniques makes it less suitable for the regulated environment of MMA competition.

Joe Rogan never fought in the UFC. He's been a commentator for the UFC for close to 20 years now. Rogan was a competitive Tae Kwon Do fighter in his late teens-early 20's and very successful. He's also an avid Brazilian Jiu Jitsu practitioner for years now, but I don't know his Belt level.