Atonio Mafi Bio
Atonio Mafi is an American professional football guard for the Las Vegas Raiders of the National Football League (NFL). Born on October 20, 2000, in San Mateo, California, he played college football for the UCLA Bruins from 2018 to 2022. Mafi was selected in the fifth round (144th overall) of the 2023 NFL Draft by the New England Patriots. Of Tongan descent, he has built a reputation as a physical offensive lineman who brings versatility and determination to every game. His NFL journey has seen him play for three franchises, culminating with his current role on the Las Vegas Raiders active roster.
Early Life and Background
Atonio Mafi was born on October 20, 2000, in San Mateo, California. He grew up immersed in sports, initially playing rugby before later transitioning to American football. His Pacific Islander heritage as someone of Tongan descent contributed to his athletic development and shaped his physical style of play.
Mafi attended Junípero Serra High School in San Mateo, California, where he played football on both sides of the ball. He was ranked as a three-star prospect and a top-130 player in California by ESPN. His outstanding high school performance earned him prestigious honors, including Central Coast Section Co-Offensive Player of the Year, WCAL Most Valuable Player, and first-team All-CIF recognition.
Initially committed to play at California, Mafi flipped his commitment and chose to continue his football career at UCLA, where he would begin an unlikely transformation that would define his future in professional football.
Path to the NFL
Mafi arrived at UCLA in 2018 as a defensive line recruit, but his college journey took an extraordinary turn when coaches informed him he needed to lose weight to have a realistic chance at playing time. When he first entered UCLA, he weighed 411 pounds with a jersey size of XXXXXL, a size 50 waist, and 40 percent body fat. One of his documented meals at the time included five beef patties with cheese, a double order of fries, and a milkshake, totaling 3,240 calories and 177 grams of fat. Determined to meet the physical demands of collegiate football, Mafi committed to a strict diet and conditioning program, dropping to 390 pounds by the time his freshman season began. He earned the starting job and became the only true freshman starting on the defensive line, appearing in 12 games with 9 starts and recording 16 tackles at nose tackle.
By the 2019 season, Mafi had continued his transformation, slimming down to 357 pounds. He posted 28 tackles including 4 tackles for loss, 1 sack, and 1 forced fumble while appearing in 12 games with 5 starts. In 2020, he made the pivotal switch to offensive line, seeing limited action in 7 games as a reserve. The following year, he played 12 games with 3 starts as he continued adapting to his new position.
Entering his final collegiate season in 2022 at 377 pounds, Mafi faced another weight challenge. His coaches told him flatly that losing the weight would give him a legitimate shot at the NFL. He responded with another dedicated offseason program, dropping to 340 pounds by the season opener. The transformation paid off as he started all 13 games at offensive guard and earned second-team All-Pac-12 recognition. He finished his UCLA career having appeared in 56 games, tying the school record for most games played.
Atonio Mafi Career
New England Patriots (2023–2024)
Atonio Mafi entered the 2023 NFL Draft projected as a fourth-to-sixth round selection. The New England Patriots selected him with the 144th overall pick in the fifth round. His selection represented the culmination of his remarkable weight-loss journey and positional transition from defensive line to offensive guard. Prior to the draft, the Los Angeles Times published a weekly diary written by Mafi documenting his preparation. He joined a Patriots organization known for developing offensive linemen and immediately set to work adapting to the professional level.
During his rookie season with New England, Mafi learned the intricacies of the Patriots offensive system while competing against established veterans. He appeared in games throughout the 2023 season, building experience that would prove valuable for his professional development. His time in New England provided a foundation in professional playbook complexity and the physical demands of NFL competition. The Patriots waived Mafi on August 27, 2024, during roster adjustments following training camp.
Indianapolis Colts (2024–2025)
Following his release from New England, Mafi quickly found a new opportunity. On August 29, 2024, he was signed to the Indianapolis Colts practice squad, where he continued developing his craft while adapting to a new defensive scheme. His performance and dedication earned him a promotion to the active roster on November 30, 2024. He saw playing time during the remainder of the regular season before being waived on December 23. Mafi re-signed to the Colts practice squad following his waiver.
Mafi signed a reserve/future contract with Indianapolis on January 6, 2025, securing his place with the organization for the 2025 season. However, the Colts waived him on May 9, 2025, during roster evaluation. Throughout his time with the Colts, Mafi demonstrated resilience and adaptability, showing the ability to transition between the practice squad and active roster multiple times.
Las Vegas Raiders (2025–present)
On July 22, 2025, Mafi signed with the Las Vegas Raiders, joining the organization as competition for a roster spot along the offensive line. The Raiders saw potential in his physical tools and his journey of transformation throughout his football career. He was waived on August 26 as part of final roster cuts before being re-signed to the practice squad the following day. Mafi spent the early portion of the 2025 season on the practice squad, continuing to refine his technique and earn the coaching staff confidence.
On November 17, 2025, the Raiders elevated Mafi to the active roster, recognizing his development and the value he could provide to the offensive line rotation. This promotion marked a significant milestone in his NFL journey, representing the third franchise in three professional seasons to promote him to the 53-man roster. Throughout his NFL career through 2025, Mafi has appeared in 23 games with 7 starts.
Playing Style and Strengths
Atonio Mafi brings a physical, powerful brand of football shaped by his unique background. His early experience playing rugby contributed to his tackle technique and physicality at the line of scrimmage. His successful weight-loss journey from over 400 pounds to his current playing weight demonstrates exceptional discipline and work ethic, qualities that translate directly to his performance on the field. At 6-foot-3 and 330 pounds, he possesses the size and strength to anchor against powerful defensive tackles and the mobility to execute pulling assignments in the running game. His experience transitioning from defensive line to offensive guard gives him a unique understanding of both sides of the ball, helping him anticipate defensive moves and react quickly to stunts and blitzes.
Atonio Mafi Career Wins
Throughout his professional football career, Atonio Mafi has established himself as a durable and versatile offensive lineman. His ability to make rosters across multiple NFL franchises demonstrates his value as a professional player. He has accumulated significant playing time in his first three professional seasons, appearing in 23 games with 7 starts across three different organizations.
Professional Career Highlights
Through three NFL seasons, Mafi has built a foundation of consistent playing time and positional versatility. His stints with the New England Patriots (2023–2024), Indianapolis Colts (2024–2025), and Las Vegas Raiders (2025–present) have provided him with diverse experience in different offensive systems and coaching philosophies. His selection in the 2023 NFL Draft in the fifth round represented his first major professional achievement, validating his transformation from a 400-plus-pound defensive lineman to an NFL-caliber offensive guard. His 2025 elevation to the Raiders active roster marked a significant career milestone.
College Achievements
At UCLA, Mafi appeared in 56 games across five seasons, tying the school record for career appearances. He earned second-team All-Pac-12 honors in 2022 after starting all 13 games at offensive guard. His 30 career starts at UCLA showcase his durability and ability to hold down a starting role at the Power Five level.
Atonio Mafi Family
Family Background and Heritage
Atonio Mafi is of Tongan descent, with his heritage tracing back to Tonga. Born and raised in San Mateo, California, he comes from a strong Pacific Islander background that has influenced his athletic development and physical playing style. His family support has been instrumental throughout his football journey, from his early days playing rugby through his transformation at UCLA and his professional career.
Personal Life
Mafi attended Junípero Serra High School in San Mateo, California, before his collegiate football career at UCLA. He is married to his commitment to football, having dedicated himself to the demanding process of transforming his body and career from defensive line to offensive guard. His documented weight-loss journey during college, including details of his dramatic dietary changes and physical transformation, has inspired others facing similar challenges.
2025 Season Performance
The 2025 season marked a significant milestone in Atonio Mafi career when the Las Vegas Raiders elevated him to the active roster on November 17, 2025. This promotion from the practice squad demonstrated the organization confidence in his abilities and provided him with an opportunity to contribute at the highest level. Throughout the early portion of the season, Mafi refined his technique and adapted to the Raiders offensive scheme while preparing for his opportunity.
His progression through three NFL teams in three seasons reflects both his resilience and his value as an offensive line asset. The Raiders coaching staff recognized his physical tools, football intelligence, and the work ethic developed through his unique college transformation. Mafi joined a Las Vegas offensive line room featuring experienced players and young talent, contributing to a competitive environment that pushed everyone to improve daily.
The outlook for Mafi remains positive as he continues establishing himself in the NFL. His 2025 promotion to the Raiders active roster represents a turning point in his professional career, offering him a stable platform to demonstrate his capabilities. With 23 games of NFL experience and a foundation built on his remarkable personal transformation, he possesses the tools necessary to build a lasting career in professional football. The physical attributes, mental toughness, and adaptability he has displayed throughout his journey position him well for continued development with the Las Vegas Raiders organization.