Simon “Bad Bwoy” Marcus is currently the #1 ranked light heavyweight Muay Thai fighter in the world. Simon was born in Toronto, Ontario, Canada on November 5, 1986 and is of Jamaican descent.


As a child Simon was a fan of WWE (formerly WWF). The superhero characteristics, flexing muscles and action packed moves wowed him at the young age of two. As a child he excelled in sports but often found himself in trouble for rough housing and fighting. By the age of eight Simon had earned the nickname Tyson for his fighting. Simon continued to get in trouble for fighting as a youth and in high school.


Simon’s first taste of Muay Thai came at the age of 16 when he went to try a free class. Simon and some friends trained at Siam No. 1 for a few weeks, but his heavy involvement in basketball kept him from fully focusing his efforts on Muay Thai. Simon was also known to run with a rough crowd and continued to get in trouble. After several arrests Simon’s parents could no longer bail him out and he had to spend 93 days in young offenders jail. He was immediately challenged upon arriving to the correctional facility and met that challenge making an example out of the person he fought which labeled him as one of the guys not to be tested. Simon realized that jail was not where he wanted to spend the rest of his life. During his time behind bars he was in his cell for 21 hours a day. Simon passed his time rapping and working out, by the time he was released he was ready for a change. Once he was released Simon went back to finish high school and returned to train Muay Thai under Ajahn Suchart. His dedication was immense as he would travel 2 hours by bus each way to train Muay Thai.


After taking training seriously Simon quickly emerged as one of the world’s top amateur fighters compiling an impressive amateur record of 19-2-2. As an amateur he won the WKA North American Cruiserweight Championship, as well as gold medal at the 2007 IFMA World Championships and a silver medal at the 2008 IFMA World Championships.

Simon jumped into the professional ranks in 2009 and saw immediate success fighting in Thailand and winning the Thaphae Stadium Light Heavyweight Championship and the Northern Thailand Cruiserweight Championship.


In 2010 Simon recorded victories over some big names that further established his presence as one of the sports best up and coming fighters. He started off the year with a win over Aaron Meisner in Florida which he then followed up with big wins against Eh Phoutong, Ryuta Noj and Guo Hang Hang. In 2010 Simon also won a Gold Medal at the Sport Accord World Combat Games where he defeated Artem Vakhitov in the finals.

In 2011 Simon recorded another win over Guo Hang Hang and began to make his presence known in the growing North American Muay Thai scene. He defeated Artem Vakhitov again and immediately became a fan favorite.

2012 marked Simon’s arrival as one of the elite fighters in the light heavyweight division. A heated rivalry began with American Joe Schilling that led to two of the most anticipated fights of the year. The pair first met at Lion Fight Promotions: Battle in the Desert 5 in Las Vegas, Nevada where Simon recorded a first round (T)KO over Schilling. Simon followed the win up with victories in China and Thailand including winning the WPMF Light Heavyweight Championship against Kaoklai Kaennorsing.


Simon returned to Las Vegas to re-match Joe Schilling at Lion Fight 6 and despite being knocked down in the first round he emerged victorious by majority decision after controlling the remainder of the fight. He out muscled and used his technique in the clinch against Schilling in what was a masterful display of clinch work.


Simon ended the year with a (T)KO victory over Sadibou Sy at Muay Thai in America: In Honor of the King in Los Angeles, California.

2013 marked another big year for Simon as he fought a total of eight times. The biggest win of his career took place when he defeated Artem Levin of Russia at Lion Fight 9 to win the Lion Fight World Light Heavyweight Championship and become the worlds #1 ranked light heavyweight fighter. Simon followed up the huge victory by winning the WCK Muay Thai World Light Heavyweight Championship in China against Belarus’s Dmitry Valent. He also defended his WPMF World Light Heavyweight title against Suriya Prasathinphimai.


In September of 2013 what was probably the most controversial decision in Simon’s career took place at Push Kick Promotions: World Stand Off 5. Simon fought Chidi Njokuani to a majority draw. Simon was deducted a point for an unintentional low blow, it wasn’t the first low blow of the fight but they were clearly unintentional but the acting that Njokuani displayed helped get the point deduction. In addition there was controversy because Njokuani refused to fight Marcus in the clinch and his method of getting out of the clinch was to turn away from Simon and have the referee break the clinch. Referee Tony Weeks received criticism for not deducting a point from Njokuani for using this tactic. After a heated post fight interview Anthony Njokuani the bother of Chidi Njokunai and UFC fighter confronted Simon back stage and a scuffle broke out.


Despite the draw Simon was nothing but focused on continuing to prove he was the best and ended 2013 with two big wins. He defeated Jiang Chunpeng in China and Damian Bujan in Argentina.

Championships & Awards
  • WBC Muay Thai Light Heavyweight Champion

  • WCK Muay Thai Light Heavyweight Champion

  • WPMF World Light Heavyweight Champion

  • Lion Fight Light Heavyweight Champion

  • Northern Thailand Cruiserweight Champion

  • Thaphae Stadium Light Heavyweight Champion

  • WKA Amateur North American Cruiserweight Champion

  • World Combat Games 2010 − 81 kg/178 lb Muay Thai Gold Medalist

  • 2007 IFMA World Championships – 81 kg/178 lb Gold Medalist

  • 2008 IFMA World Championships – 81 kg/178 lb Silver Medalist

  • 2012 Muay Thai Authority North American Fighter of the Year

  • 2013 Muay Thai Authority North American Fighter of the Year