Complex sentence: Hall is an expert in combatives, kickboxing and Brazilian Jiu-Jitsu and competes professionally as a heavyweight in submission grappling and was ranked 5th in the United States in 2012 out of about 5,000 fighters in his age division.
Split into simpler sentences: Hall is an expert in combatives, kickboxing and Brazilian Jiu-Jitsu. He competes professionally as a heavyweight in submission grappling and Brazilian Jiu-Jitsu and was ranked 5th in the United States in 2012 out of about 5,000 fighters in his age division.