Question: Stipe Miocic ( ; born August 19, 1982) is an American professional mixed martial artist currently competing in the UFC, Miocic has defended the belt twice, and by doing so has tied the record for most successful title defenses held with which American professional wrestler and former professional mixed martial artist, professional American football player and amateur wrestler who is currently signed with WWE?
Context: Robert Glenn "Robbie" Lawler (born March 20, 1982) is an American professional mixed martial artist and former UFC Welterweight Champion.  A professional competitor since 2001, Lawler is also a former EliteXC Middleweight Champion, and has formerly competed in Strikeforce, PRIDE, and the IFL.  He is widely considered one of the most consistently entertaining mixed martial artists currently competing, being the only fighter to have won three consecutive "Fight of the Year" awards from Sherdog and MMA Fighting, for his bouts against Johny Hendricks (at UFC 171, in 2014), Rory MacDonald (at UFC 189, in 2015), and Carlos Condit (at UFC 195, in 2016). Brock Edward Lesnar ( ; born July 12, 1977) is an American professional wrestler and former professional mixed martial artist, professional American football player and amateur wrestler who is currently signed with WWE.  He performs on the Raw brand where he is the current WWE Universal Champion in his first reign. Stipe Miocic ( ; born August 19, 1982) is an American professional mixed martial artist currently competing in the Ultimate Fighting Championship (UFC).  He is the reigning, defending UFC Heavyweight Champion.  As of September 2017, he is ranked #3 pound-for-pound in the UFC.  Miocic has defended the belt twice, and by doing so has tied the record for most successful title defenses held with Randy Couture, Tim Sylvia, Brock Lesnar, and Cain Velasquez. Patrick "Pat" Healy (born July 20, 1983) is an American professional mixed martial artist currently competing in the Lightweight division of Titan FC.  A professional competitor since 2001, Healy has also formerly competed for the UFC, Strikeforce, the WEC, the IFL, the MFC, King of the Cage, ACB and Shark Fights.  His twin brother, Ryan, is also a professional mixed martial artist. Kim Min-soo (born January 22, 1975) is a South Korean former judoka, professional mixed martial artist and K-1 kickboxer.  He is best known for becoming a K-1 World Grand Prix 2006 Finalist and also winning the 1996 Summer Olympics in Atlanta earning a Silver Medal in Judo.  He is also known for his fights with current WWE professional wrestler and former UFC Heavyweight Champion and veteran Brock Lesnar, former WWE wrestler and K-1 fighter Sean O'Haire and former NFL football player turned K-1 kickboxer and New Japan Pro Wrestling contender Bob Sapp.  Min-soo holds a notable kickboxing win over former UFC fighter Scott Junk.  He announced his retirement from contact sports in 2011 with brief stints as color commentator for Japanese and Korean mixed martial arts and professional wrestling events.  Kim is also the Judo head coach for Korean Top Team. Darrell Horcher (born July 28, 1987) is an American mixed martial artist currently competing in the Lightweight division of the UFC.  A professional mixed martial artist since 2010, he formerly competed for Bellator and the Cage Fury Fighting Championships, where he was the Lightweight Champion. Ryan Couture (born August 27, 1982) is an American professional mixed martial artist currently competing in the Welterweight division of Bellator MMA.  A professional competitor since 2009, he has formerly competed for the UFC and Strikeforce.  He is the son of UFC Hall of Famer Randy Couture. Jens Johnnie Pulver (born December 6, 1974) is an American professional mixed martial artist and undefeated boxer and kickboxer.  Pulver was the inaugural UFC Lightweight Champion in addition to serving as the head coach on "The Ultimate Fighter 5" reality show against long-time rival B.J. Penn.  In mixed martial arts, Pulver competed at the Lightweight, Featherweight, Bantamweight and Flyweight divisions in addition to competing at the Middleweight, Light Middleweight, and Welterweight divisions as a professional boxer.  While perhaps best known for competing in the UFC, Pulver has also competed in Pride Fighting Championships, for the PRIDE 2005 Lightweight Grand Prix.  He is to-date the youngest UFC Lightweight Champion in the UFC history, eventually relinquishing his title, after two defenses, due to a contract dispute.  Pulver officially retired from combat sports in 2014.  Pulver is considered the founder of the UFC lightweight division. Saul Almeida (born June 4, 1989) is a Brazilian-American professional mixed martial artist currently competing in the featherweight division for the World Series of Fighting.  A professional mixed martial artist since 2008, Almeida has also formerly competed for Bellator. 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.
Answer: Brock Edward Lesnar