Alex Oliveira Bio | Controversies, Wife, Net Worth, ESPN & UFC

This article was last updated by on

“In life sometimes, you have to choose the work as per the time and condition rather than your desire.

But, if you do not give up on the dream profession, you are destined to make it up to there.” This lesson is best taught by the mixed martial artist Alex Oliveira AKA Cowboy.

Indeed, the boxer reached the highest peak in the UFC with his full dedication. If he were in his past job, then he would not have gained immense fame.

ALex Oliveria Cowboy
Alex Oliveria Cowboy.

Well, we will talk about his past in the article below. Not only name and fame, but the Cowboy has also achieved several honors and awards.

His accomplishments include three times “Performance Of The Night,” two times “Fight Of The Night,” and more until now.

Alex’s life, which is very secretive and out of the media, is full of mystery and more.

To give you more closure about him, including family, net worth, wife, controversies, and more, the following article is presented.

Quick Facts:

Full Name Alex de Oliveira
Nick Name Cowboy
Age 36 Years Old
Height 5 feet 11 inches (1.80m)
Weight  171 lbs (78 kg).
Horoscope Pisces
Date Of Birth February 21, 1988
Birth Place  Três Rios, Rio de Janeiro, Brazil
Religion Not Available
Nationality Brazilian
Ethnicity Not Available
Hair Colour Black
Eye Colour Black
Skin Colour Black
Marital Status Married
Wife Mariana Cassiano 
Kids More than ten children
Father’s Name Not Available
Mother’s Name Not Available
Siblings Three brothers and four sisters; two brothers deceased in a violent crime
High School  Not Available
University Not Available
Graduated Year  Not Available
Profession Mixed Martial Artist
Years Active 2011- present
Division Lightweight/Welterweight
Stance Orthodox
Current Team ATS
Former Team Tata Fight Team (2013-2018)
Rank Dark blue prajied in Muay Thai
Blue Belt in Brazilian Jiu-Jitsu
Accomplishment in the Ultimate Fighting Championship Three times Performance of the Night.
Two times Fight of the Night
Net Worth $1.5 million
Salary $700k (As of 2019)
Social Media Instagram
UFC Merch Gloves, Punching Bag, Shorts
Last Update May, 2024

Alex Oliveira | Early Life, Family & Education

Alex, the renowned MMA fighter, was born Alex de Oliveira on February 21, 1988. He was raised in the city of Três Rios, Rio de Janeiro, Brazil.

The welterweight UFC fighter Oliveira was born to an unnamed father and mother. As for his siblings, Alex has four sisters and three brothers.

Just like his parents, even their names and information are missing from the public. 

Sadly, the fighter lost his two brothers due to a violent crime. Along with the loss of loved ones, some sources claim he had a hard time growing up. 

As a matter of fact, Alex used to work as a construction worker and bull rider. 

Age, Height, and Weight

Alex is 36 years old as of 2024. He stands at the towering height of 5 feet and 11 inches (1.80m) and weighs 171 lb (78 kg).

Being a fighter, he has a robust physique obtained from his well-maintained diet and exercise regime. His online pictures are evidence enough. 


The mixed martial artist is originally from Brazil. As a result, his nationality is Brazilian. However, their ethnicity of Alex is unknown.


Up to this date, Alex has not revealed his educational background. Therefore, there is not much information about his school and degrees. 

Get To Know The Personal Life Of Jimi Manuwa:<<Jimi Manuwa Bio: Wife, Career, Net Worth & Stats>>

Alex Oliveira Net Worth | Salary and Career Earning

Alex is one of the top fighters who has collected colossal money. As of early 2019, his net worth was about $700k.

But, the Cowboy’s fortune kept on expanding along with his professional career. As per some reliable sources, Alex Oliveira has a net worth of $1.5 million in 2024.

Besides, the Cowboy earns a hefty salary per fight. For instance, he made about $500k from the Ultimate Fighting Champions match in 2015.

The amount included endorsement earning as well. Similarly, Alex made $64k per fight in 2020. Also, he got a raise in sponsorship earning $15k per row.

Also, read about next Richest UFC Fighter: <<Felice Herrig Bio- MMA, UFC, Next Fight, Nationality & Net Worth >>

Alex Oliveira | Professional Career


After training in Muay Thai for a couple of years, Alex entered the Mixed martial artist at age 22.

Further, he fought for the first time in the welterweight division in December 2011. Oliveira was into MMA until UFC signed him in 2015.

UFC Career Highlights

The Cowboy made his UFC debut on March 21, 2015, against Gilbert Burns at UFC Fight Night 62. But, he lost it in the third round via submission.

Again, Alex battled against the K.J. Noons on May 30, 2015, at UFC Fight Night 67 and got his first UFC victory.

Plus, his success continued in his third row, though Alex competed for almost three months.

Alex Oliveira
Alex Oliveira

Then, the Cowboy fought in opposition to Piotr Hallmann in a lightweight bout at UFC Fight Night 77 on November 7, 2015.

After reaching in the third round, he knocked down the opponent. As a result, not only did he win the match, but he also achieved his first Performance of the Night bonus award.

Further, the Cowboy fought against fierce fighters like Piotr Hallmann, Donald Cerrone, James Moontasri, and Will Brooks.

Likewise, he also faced Tim Means, Ryan LaFlare, Gunnar Nelson, Nicolas Dalby, and several others.

Alex Oliviera Vs. Shavkat Rakhmonov

To date, the Cowboy has competed against numerous fighters in the Ultimate Fighting Championship, and every match has become the highlight of his career.

In the same way, on October 24, 2020, he fought with the opponent Shavkat Rakhmonov at the event UFC 254 in Abu Dhabi, United Arab Emirates.

As expected, the fight was the highlight of the championship this year, and many people talked about it. 

Do you know that many social sites, including YouTube, began predicting the scheduled battles? 

Eventually, the most awaited fight between Alex and Shavkat took place on a specific date. They were having a fierce riot against each other from the first round already.

But, when the time exceeded not more than 4 minutes and 40 seconds, Shavkat used his arms around the Cowboy’s neck, similar to a guillotine.

As a result, Alex lost his match in opposition to Rakhmonov.

MMA Record

Let’s have a look at the professional MMA record of Alex Oliveira.

Professional record   
36 matches 22 wins 11 losses
By knockout 12 1
By submission 5 6
By decision 5 4
Draws 1
No contests 2

Is Alex Oliveira Married? Love Life, Wife

Alex’s marriage and love life are incredibly mysterious, contrary to his professional career.

Still, the news of him being married is suspicious as he has not given a rigid statement on any of his marriages.

alex oliveira wife
Alex Oliveira with his wife.

However, Alex commented on his estranged wife, Mariana Cassiano, in one of his interviews in March 2020. He said that the pair never separated anyway.

Also, the Cowboy said that she is the woman he is deeply in love with. Despite their controversial past, they never separated. 

Detail On Alex Oliveira Children And Other Affairs

Marissa is indeed the only woman in Alex’s life, but the same cannot be said about his children.

According to the different sources, Alex is the father to more than ten children from several relationships.

The names and other information regarding the children are missing at the moment.

Moreover, the Cowboy became blessed with another child from Mariana Cassiano in late 2020.


On May 24, 2019, Alex attended one of the parties where he got involved in a fight with a security guard.

At that time, the Cowboy was under the influence of drinks. As per the report, the MMA fighter threatened the guard.

Well, this is not his first assault that got out in public. Similarly, Alex made headlines for assaulting his ex-wife Mariana Cassiano in his hometown, Tres Rios, on May 26, 2019.

According to some sources, the Cowboy punched her and even broke down their house’s windows and doors.

Moreover, under the influence of alcohol, Oliveira insisted on riding a motorcycle while carrying his infant son. 

Also, the infant was found at his sister’s apartment later on. Despite the gravity of the incident, Marissa refrained from reporting to the police.

alex oliveira family
Alex Oliveira with his family

Likewise, the Cowboy was not seen until his must-win battle in early March 2020. When asked about the incident, he denied every accusation by saying,

“I’m a famous guy, so it’s easy to come to me. But nobody knows the whole story. But we’re together, yes, and she’s pregnant again, thank God. We’re very happy, like a normal family. I’m happy because she’s the woman I love.”

Also, in that specific interview, Alex stated that they just had a usual fight like every couple.

In conclusion, the blame on him dissolved within that time. Similarly, Alex confessed that he is ashamed about the incident and how it affected his family.

Further, he also swore that he has learned from his mistakes and will never repeat them. 

Unfortunate Grenade Encounter

In 2018 during the time of Christmas Eve, Alex walked out of the house in his hometown to get gasoline for his mother’s car.

While the Cowboy was on his way, some thugs threw the grenade over him, which injured his leg.

At the same time, his parents were in an altercation with the thugs who were heavily armed. Furthermore, Alex had to undergo surgery to remove the grenade’s fragments.

 Alex Oliveira | Exciting Facts 

  1. Oliviera’s reach is 76 inches (193cm).
  2. Similarly, Alex’s fighting style includes Muay Thai and Brazilian Jiu-Jitsu.
  3. Oliveira has a black belt in Brazilian Jiu-Jitsu. Plus, Alex holds the dark blue prajied in Muay Thai.
  4. Alex’s nickname is Cowboy. He received the name because of his old job as a Rodeo Bullrider.
  5. His trainer is André Tadeu.
  6. As of writing the article, Alex has about 124k followers on his official Instagram account. And he has shared about 1.2k posts, including videos and photos. 
  7. In 2017, Alex faced the opponent Yancy Medeiros. They two had a furious fight in which Yancy won. However, the Cowboy earned his first ‘Fight Of The Year’ from the news channel ESPN.
  8. Also, Alex has won 22 MMA fights in a total of 34.

Social Media Presence:

Alex Oliveira is quite active on social media. You can follow him via these links:

Instagram: alexcowboyofficial

Twitter: @AlexCowboyUFC

Some FAQs:

Who is Alex Oliveria’s trainer?

André Tadeu is the rainer of Alex Oliveria.

Are Alex Oliveria and Charles Oliveira siblings?

No, Alex Oliveria and Charles Oliveira  are not siblings. 

What is Alex Oliveira’s net worth?

Alex Oliveira has a net worth of $1.5 million as of now.

What is Alex Oliveria’s fight record?

As of writing, Alex Oliveira has a professional fight record of 20 wins, 11 losses, and 0 draws.

Did Alex Oliveria face Peter Sobotta?

Alex Oliveira faced Peter Sobotta at “UFC Fight Night: Whittaker vs. Till” and won the fight via unanimous decision on July 26, 2020.

Who won Alex Oliveria vs. Max Griffin?

Alex Oliveria won the fight via split decision. Alex faced Max at UFC 248 on March 7, 2020.

Did Alex Oliveria face Randy Brown?

Yes, Alex Oliveria faced Randy Brown at UFC 261 on April 24, 2021. Randy won the fight via submission (rear-naked choke).

Soni Pahadi
Soni Pahadi

Soni Pahadi

Soni Pahadi is a dedicated writer with a passion for uncovering the untold stories within the sports world. Her articles offer readers a captivating blend of insightful analysis, human interest narratives, and cultural commentary that enriches their understanding of the athletes and events that shape the sporting landscape.


Youth Sports Diversity Stories


  • Soni delves into the cultural significance of sports, exploring how athletic events intersect with identity, tradition, and societal values.
  • She advocates for youth participation in sports, highlighting the benefits of athletic activities for physical health.


With a background in writing and a deep-seated passion for sports, Soni approaches each article with enthusiasm, curiosity, and a commitment to amplifying diverse voices within the sports community. She seeks to inspire, educate, and empower readers through her storytelling, fostering a deeper connection to the world of sports.

Related articles



Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Share article

Latest News