About David O'Leary
David Anthony O'Leary is a football manager and former player. The majority of his 20-year playing career was spent as a central defender at Arsenal, where his tally of 722 appearances stands as a club record. He played 68 times for the Republic of Ireland from 1976 to 1993, and was part of the squad that reached the quarter-finals of the 1990 FIFA World Cup. O'Leary broke numerous appearance records at Arsenal; he was the youngest person to reach the 100- and 200-match milestones, and he made his 400th appearance while still only 26. He won his first major honour with Arsenal when he played in their 3–2 win over Manchester United in the 1979 FA Cup final. He passed George Armstrong's all-time record of 621 first-team games in November 1989.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.