Jerwin Ancajas Bio
Jerwin Juntilla Ancajas (born 1 January 1992) is a Filipino professional boxer. Known by his ring name Pretty Boy, Ancajas competed at super flyweight and bantamweight and held the IBF junior-bantamweight title from 2016 to 2022. A southpaw with a 169 cm reach, he turned professional in 2009 and built a career marked by long winning streaks and multiple world-title defenses.
Born and raised in Panabo, Davao del Norte, in the southern Philippines, Ancajas was introduced to the sport at an early age by his older brother, Jesar. He developed into one of the country’s most reliable champions of his era, defending his world title across several continents before eventually losing the belt.
Early Life and Background
Jerwin Juntilla Ancajas was born on 1 January 1992 in Panabo, a suburb in the province of Davao del Norte, Philippines. He grew up in a modest household and was introduced to boxing in the second grade by his brother, Jesar Ancajas, who remained a central figure in his life and training environment. The early years spent around local gyms in Mindanao shaped his interest in the sport.
As a young amateur, Ancajas showed clear promise. He went on to win several national championships, including a gold medal at the Palarong Pambansa, the Philippines’ premier student athletic competition. His amateur record is listed at 90 wins against 5 losses, reflecting a strong pedigree before he turned professional in 2009 at the age of 17.
Path to Boxing
Ancajas’s transition into professional boxing came in July 2009, when he made his debut as a teenager. He quickly built experience in regional cards and captured his first notable professional title, the WBO Asia Pacific Youth junior-bantamweight belt, against Rex Tito at SM City Lipa. The win signaled that the young Filipino was ready for bigger opportunities.
He suffered a setback in his fifteenth professional bout, dropping a majority decision to Mark Anthony Geraldo. Despite that loss, Ancajas bounced back by stringing together wins that caught the attention of international promoters, ultimately earning him a shot at a major world title in 2016.
Jerwin Ancajas Career
Early Career (2009-2015)
Ancajas spent his first years as a professional fighting primarily in the Philippines and across Asia. He compiled a busy schedule, learning the craft of the paid ranks and sharpening the southpaw skills that would later define his style. Most of his early opponents were outmatched, and he built the foundation for a world-title push through a steady flow of knockout wins.
By the time he was ready for a major opportunity, Ancajas had pieced together an 11-fight win streak, including his regional title win over Tito. That run positioned him as a credible challenger on the international stage.
IBF Junior-Bantamweight Champion (2016-2019)
Ancajas became IBF junior-bantamweight champion on 3 September 2016, defeating McJoe Arroyo by unanimous decision. Ancajas comfortably outboxed Arroyo, dropping him in round eight to win on the scorecards, and earned a reported $3,750 for the bout. The victory launched one of the most active title reigns in the division.
He made his first defense on 29 January 2017, beating José Alfredo Rodríguez by technical knockout after Rodríguez could not continue due to injury. In July 2017, Ancajas stopped Teiru Kinoshita in round seven on the undercard of Manny Pacquiao-Jeff Horn, opening a cut and finishing with a right hook to the body. On 18 November 2017, he stopped Jamie Conlan in round six, completing three successful title defenses in 2017, all by technical knockout and in different countries.
In December 2017, it was announced that Ancajas had signed with Top Rank, and he made his U.S. debut on 3 February 2018 in Corpus Christi, Texas, successfully defending his IBF belt against Israel González. He then dominated fellow Filipino Jonas Sultan, winning wide unanimous decisions on all three scorecards. On 29 September 2018, he fought Alejandro Santiago Barrios to a draw, keeping his belt. He followed that with a seventh-round stoppage of Ryuichi Funai and a sixth-round TKO of Miguel Gonzalez on 7 December 2019, extending his reign deep into 2019.
Title Defenses and Late Reign (2021-2022)
On 10 April 2021, Ancajas made his ninth IBF title defense against Jonathan Javier Rodriguez, winning by unanimous decision with scores of 115-112, 116-111, and 117-110. He continued to be one of the most active champions in the junior-bantamweight division throughout his reign, traveling across continents to take on mandatory challengers and ranked contenders.
His reign ultimately came to an end in 2022, when he lost the IBF junior-bantamweight title. The loss closed a chapter in which Ancajas had established himself as a durable and well-traveled Filipino world champion.
Style and Strengths
Ancajas is a southpaw with a 169 cm reach who built his game on patient pressure and accurate straight punches. He became known for breaking opponents down with body work, often opening cuts before finishing with hooks upstairs, and for his ability to keep a high pace across twelve rounds.
Notable Events and Milestones
Signature moments include his unanimous-decision win over McJoe Arroyo to claim the IBF title, his trio of 2017 stoppages across different countries, and his first U.S. defense in Corpus Christi, Texas. He also earned recognition for racking up multiple defenses on the Manny Pacquiao-Jeff Horn undercard and for facing top-ranked contenders such as Jonas Sultan and Ryuichi Funai.
Jerwin Ancajas Career Wins
Across his professional career, Jerwin Juntilla Ancajas has compiled a record that features a heavy share of knockouts, reflecting his aggressive style as a southpaw pressure fighter. His title reign from 2016 to 2022 included multiple successful defenses across several countries, establishing him as one of the more active junior-bantamweight champions of his era.
IBF Junior-Bantamweight Highlights
Ancajas won the IBF junior-bantamweight title by beating McJoe Arroyo in 2016 and went on to make a series of successful defenses. Highlights include technical knockout wins over José Alfredo Rodríguez, Teiru Kinoshita, Jamie Conlan, Ryuichi Funai, and Miguel Gonzalez, as well as a unanimous-decision win over Jonathan Javier Rodriguez in 2021. He also fought to a draw with Alejandro Santiago Barrios in 2018 while retaining his belt.
Other Wins & Performances
Earlier in his career, Ancajas captured the WBO Asia Pacific Youth junior-bantamweight title against Rex Tito at SM City Lipa, marking his emergence as a regional champion. He built the rest of his resume on busy domestic cards across Asia before stepping onto the world stage in 2016.
Jerwin Ancajas Family
Family Background and Racing Lineage
Jerwin Ancajas was introduced to boxing by his older brother, Jesar Ancajas, who has remained a close companion throughout his career. The brothers share a strong bond rooted in their early life in Panabo, Davao del Norte, and Jesar’s early encouragement helped steer Jerwin toward the sport.
Personal Life
Jerwin Juntilla Ancajas currently resides in Barangay Ramirez, Magallanes, Cavite, in the Philippines, together with his brother, Jesar Ancajas. He is known publicly by the nickname Pretty Boy, a moniker that reflects his popularity among fans in the Philippines and abroad.
2025 Season Performance
Coming off the end of his IBF junior-bantamweight title reign in 2022, Jerwin Juntilla Ancajas entered 2025 looking to re-establish himself in the super flyweight and bantamweight divisions. His experience as a long-reigning champion made him a valuable name in matchmaking, and he remained active on regional and international cards.
Throughout 2025, Ancajas continued to leverage his southpaw style and high punch output against a new generation of contenders. His goals included positioning himself for another world-title opportunity at either super flyweight or bantamweight, building on the résumé he assembled during his IBF reign.
With his Top Rank association still a defining part of his profile, Ancajas remained a respected veteran presence in Asian boxing, and his 2025 campaign was viewed as a bridge toward potential future championship bouts.