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Sean Mannion

Super Welterweight · Retired · Ireland

Sean Mannion

At a glance

Born
October 6, 1956 (age 70)
Nationality
Ireland
Birthplace
Rosmuc, Ireland
Division
Super Welterweight
Height
5ft 9in (174 cm)
Reach
72in (183 cm)
Stance
Southpaw
Pro debut
June 28, 1978
Retired
March 17, 1993

Story

Boxing Only · Updated Jul 8, 2026

Sean Mannion, born on October 6, 1956, in the small Irish village of Rosmuc, carved out a respectable career in professional boxing during an era rich with talent in the super-welterweight division. A southpaw standing 5 feet 9 inches tall, Mannion combined durability with determination throughout a career that spanned 15 years. Despite humble beginnings, he earned his place on the world stage, ultimately challenging for a world title and competing against some of the era's most skilled fighters.

Mannion began his professional journey on June 28, 1978, with a debut at the Hynes Auditorium in Boston, Massachusetts. He marked the occasion with a third-round technical knockout victory over Pat McCarthy, launching a career closely tied to his adopted home of Dorchester, Massachusetts. Boston's Irish-American community quickly embraced the fighter, whose rugged style and tenacity in the ring mirrored his roots.

Throughout his career, Mannion amassed a record of 42 wins, 14 losses, and 1 draw, with 13 of those victories coming through knockout. His most prominent moment came on October 19, 1984, at Madison Square Garden, when he faced the undefeated Mike McCallum for the vacant WBA Super-Welterweight title. The fight was significant in boxing history, marking the first time two women judged a world championship. Despite Mannion's grit and endurance, McCallum's superior skill set and relentless body attack proved too much, and Mannion lost via a lopsided unanimous decision. This fight, however, showcased Mannion's toughness, as he went the complete 15 rounds against one of the sport's most technically proficient fighters.

Throughout his career, Mannion shared the ring with several notable opponents. In addition to his title bout against McCallum, he faced names like Louie Aulces and Santiago Samaniego, testing himself against various styles and levels of competition. Though he never captured a world championship, his consistent performances against world-class opposition earned him respect within the boxing community.

Mannion's final professional outing came on March 17, 1993, at the Hynes Convention Center in Boston, where his career had begun. Fittingly, his farewell fight ended in victory, as he secured a six-round points decision against Bob Byrd. This win allowed Mannion to close out his career on a high note, bringing his record to 42-14-1.