| Marcos Santa Cruz Oliveira | |
| Other Names: | Santa Cruz |
| Birth Date: | 21 June 1978 |
| Birth Place: | Rio de Janeiro, Brazil |
| Residence: | United States |
| Weight: | 257lb |
| Weight Class: | Heavyweight |
| Style: | Judo, Brazilian Jiu-Jitsu, Capoeira[1] |
| Fighting Out Of: | Rio de Janeiro, Brazil |
| Team: | Abu Dhabi Combat Club |
| Rank: | Black belt in Brazilian Jiu-Jitsu, black dan in Judo, black belt in Capoeira |
| Years Active: | 2004-2011 |
| Mma Kowin: | 2 |
| Mma Decwin: | 2 |
| Mma Otherwin: | 1 |
| Mma Koloss: | 1 |
| Mma Subloss: | 1 |
| Mma Decloss: | 1 |
| Sherdog: | 11314 |
Marcos Oliveira (born June 21, 1978) is a professional Brazilian jiu-jitsu and mixed martial arts fighter from Brazil. He competes in the heavyweight division of Brazilian jiu-jitsu.
Oliveira received his black belt in judo in 1995. He received his brown belt and his black belt in mixed martial arts in December 2006.[2]
In 2010, Oliveira was invited to compete in the Abu Dhabi Fighting Championship Open Weight Grand Prix. He defeated Johan Romming in the first round and Neil Wain in the second round to reach the "one-million-dirham (US$272,260.72)" final.[3] Oliveira went to Thailand to improve his striking before the final fight.[4] However, he lost to Russia's Shamil Abdurakhimov in round three. He retired after this fight.
|-|Loss|align=center|5–3|Shamil Abdurakhimov| TKO (punches)| ADFC: Round 3||align=center|1|align=center|1:56|Abu Dhabi, UAE|ADFC Heavyweight tournament finals|-|Win|align=center|5–2|Neil Wain| Decision (unanimous)| ADFC: Round 2||align=center|3|align=center|5:00|Abu Dhabi, UAE|Advanced to the finals|-|Win|align=center|4–2|Johan Romming| KO (punch)| ADFC: Round 1||align=center|1|align=center|0:19|Abu Dhabi, UAE|Advanced to second round|-|Win|align=center|3–2|Kevin Jordan| Decision (unanimous)| FFP - Untamed 22||align=center|3|align=center|5:00|Plymouth, Massachusetts, United States||-|Win|align=center|2–2|Sean Thompson| TKO (punches)| NACC - North American Combat Challenge||align=center|1|align=center|2:38|Key West, Florida, United States||-|Loss|align=center|1–2|Josh Haynes| Submission (guillotine choke)| XFC - Dome Of Destruction 1||align=center|1|align=center|3:21|Tacoma, Washington, United States||-|Loss|align=center|1–1|Warren Kikaba| Decision (unanimous)| FCC 16 - Freestyle Combat Challenge 16||align=center|3|align=center|5:00|Racine, Wisconsin, United States||-|Win|align=center|1–0|Anthony Barbier| Submission (D'Arce choke)| BONO 15 - Battle of New Orleans 15||align=center|1|align=center|1:29|Metairie, Louisiana, United States||-