Carlos Machado is the brother-in-law of a professional mixed martial artist with how many wins by knockout?
Stephen Thompson (fighter) Stephen Randall Thompson (born February 11, 1983) is an American professional mixed martial artist and former professional full-contact kickboxer who currently fights as a welterweight in the Ultimate Fighting Championship. Thompson is undefeated through 37 amateur and 57 professional kickboxing matches, with 40 wins by knockout. He is currently #1 in official UFC welterweight rankings and ranked as the #2 welterweight in the world by Sherdog. He has trained with former UFC Welterweight Champion Georges St-Pierre and currently trains with his brother in law, former UFC Middleweight Champion Chris Weidman.
Donald Cerrone Donald Anthony Cerrone ( ; born March 29, 1983) is an American professional mixed martial artist and former professional kickboxer currently competing in the UFC's Lightweight and Welterweight divisions. He is ranked #6 in the official UFC Welterweight rankings tied with fellow Welterweight contender Neil Magny. A professional competitor since 2006, Cerrone has also formerly competed for the WEC. Cerrone currently holds the record for most post-fight bonuses (Fight/Performance of the Night, Knockout/Submissions of the Night) in UFC/WEC history with 18. He is also known as the "busiest" fighter in the UFC, due to consistently having at least four fights per year since 2013.