Kattar was born on March 26, 1988, in Methuen, Massachusetts, to James and Sandra Kattar; the family is of Lebanese descent and operates a golf course in the area (Wikipedia). He has two brothers, Jamison, a firefighter who also promotes MMA events, and Keegan, along with a sister, Kylee Reynolds (Current Affairs). Kattar wrestled at Methuen High School starting in ninth grade, reaching as high as eighth in Massachusetts at 160 pounds and placing fifth at the Division I MIAA state championships as a senior in 2006, before earning an associate degree at Middlesex Community College (Wikipedia). At age 19 he trained on the West Coast with Nick and Nate Diaz, an experience he has credited with shaping the work ethic that carried into his professional fighting career.

Kattar turned professional in 2007 and won eight consecutive fights on the New England regional circuit, including a stint with EliteXC, going more than seven years unbeaten before signing with the UFC (Wikipedia). He made his UFC debut on short notice at UFC 214 on July 29, 2017, taking a unanimous decision over Andre Fili for a reported purse of roughly $26,500 including his fight week incentive pay (Sportszion). He followed that with a TKO of Shane Burgos in January 2018 that earned a Fight of the Night bonus, then dropped a unanimous decision to Renato Moicano that April, an early back-and-forth stretch that established him as a durable, action-first featherweight rather than an immediate title threat.

Kattar’s ranking climb accelerated through 2018 and 2020, punctuated by a highlight-reel knockout of Jeremy Stephens that Wikipedia’s own career retrospective lists among the ninth-best knockouts of 2020, and by a dominant main-event unanimous decision over Dan Ige at UFC on ESPN: Kattar vs. Ige, fought behind closed doors on July 16, 2020, at the du Forum on Yas Island in Abu Dhabi during the UFC’s pandemic-era Fight Island series (Wikipedia). The Ige win pushed him into the featherweight top five and set up the fight that would define his career six months later.

On January 16, 2021, Kattar headlined UFC on ABC: Holloway vs. Kattar against former featherweight champion Max Holloway at Etihad Arena on Yas Island in Abu Dhabi. Holloway won a lopsided unanimous decision (50-43, 50-43, 50-42) while setting significant striking-volume records, yet Kattar never went down, absorbing five rounds of punishment and finishing the fight on his feet in a performance both fighters were awarded Fight of the Night bonuses for (Wikipedia). A year later, on January 15, 2022, Kattar headlined again at the UFC Apex, taking a unanimous decision over Giga Chikadze in what payout trackers list as his largest individual purse, an estimated $256,000 including a $50,000 bonus (Wikipedia). Split-decision and TKO losses to Josh Emmett in June 2022 and Arnold Allen that October followed, the Allen fight reportedly Kattar’s biggest single payday at a $350,000 guaranteed base, before a unanimous-decision loss to former bantamweight champion Aljamain Sterling at UFC 300 on April 13, 2024, an event that paid a then-record $300,000 in Fight of the Night bonuses across the card (Wikipedia). He has since gone the distance in losses to Youssef Zalal in February 2025 and Steve Garcia in July 2025.

Kattar has collected five UFC Fight of the Night bonuses in his career, for his fights with Shane Burgos, Zabit Magomedsharipov, Max Holloway, Giga Chikadze and Josh Emmett, a tally that reflects a style built on volume striking and full-distance wars rather than cautious point fighting (Wikipedia). Within MMA media and fan circles, the Holloway fight in particular has endured as a reference point for chin durability, cited repeatedly in years since as one of the more punishing losses any fighter has walked away from on their feet, and it cemented “The Boston Finisher” as a recognizable name among featherweight contenders well beyond his native New England.

Payout and endorsement trackers list Kattar as carrying sponsorships from Venum, Reebok, Habrok, Natural Effex, MyBookie.ag, TNNS and Hyperice across his UFC run, with cumulative endorsement income estimated at roughly $500,000, though that figure comes from independent aggregators rather than any disclosed contract value (Sportszion). A separate tracker noted a $21,000 sponsorship bonus tied to a recent UFC Vegas appearance, consistent with the smaller, fight-by-fight endorsement income typical of a ranked contender rather than a pay-per-view headliner (Surprise Sports).

Kattar is the owner of the regional MMA promotion Combat Zone, a New England-based fight organization he purchased in June 2013 and has continued to run alongside his own UFC competing career (Wikipedia; Current Affairs). The arrangement gives him a promoter’s stake in the sport separate from his own fight purses, staging events and developing regional talent in the Massachusetts market where he still trains. No other formally documented business or ownership stake was found in the sourcing for this profile.

No specific home purchase, property value or other major asset has been publicly documented for Kattar in the sources reviewed for this profile. He is consistently described as based in his hometown of Methuen, Massachusetts, where his family has long operated a golf course and where he continues to train with the New England Cartel, Lauzon MMA and Hard Knocks Boston gyms (Wikipedia); beyond that hometown base, his property holdings are not itemized in any public record found for this profile.