Marcos began practicing Judo when he was 11 years old before transitioning into Brazilian Jiu-Jitsu shortly after, training under Master Nonato Machado until moving to Rio de Janeiro at the age of 13.
It was in Rio de Janeiro where Lôro started training heavily in Mixed Martial Arts and where he received his black belt in Brazilian Jiu-Jitsu from the hands of Nova União founder André Pederneiras who would be his coach for the most part of his career.
In 2003 Marcos was awarded his black belt, and shortly after he started pursuing a career in mixed martial arts.
After a good start fighting in organizations like Shooto and traveling to Japan where he amounted wins that carried him to the WEC (considered at the time, the prime organization for MMA lighter weight competitors), Galvão hit a rough slope, and lost two fights in a row at the WEC.
That was when his good friend Vítor Ribeiro invited Galvão to come to New York and start training with him, Lôro gladly accepted the offer and moved to the United States, where he trained full-time at Long Island MMA and also Church Street Boxing Gym with striking coach Jason Strout.
After a few hurdles in his career, injuries, including facing-off against one of his teammates, and deciding to change teams due to training difficulties, Lôro defeated Joe Warren and earned the Bellator Bantamweight title.
Galvao made his professional debut in 2003 for the Japanese Shooto organization, where he competed primarily, compiling a record of 6–1 before being signed by the WEC.
Following a loss in his WEC debut to Bowles, Galvão returned to Japan to challenge the undefeated Shooto Bantamweight Champion Masakatsu Ueda.
Along with Smith, many top MMA sites, (MMAJunkie, Sherdog, MMAFighting, MMASpot), all believed that Galvão won the fight by 29–28.
Galvao fought former WEC Bantamweight Champion Chase Beebe in a quarterfinal match-up on 24 September 2011 and won via split decision.
[4] In the semifinals, Galvão lost a very close fight against Cuban Alexis Vila at Bellator 55, losing by split decision (29–28, 29–28, 27–30).
The couple currently reside in California where Galvão trains and teaches Brazilian Jiu-Jitsu and Mixed Martial Arts.