The Dublin-born midfielder's story takes in three League of Ireland titles, a move to one of the world's biggest clubs, 16 Republic of Ireland caps, and a contract standoff with one of the most intimidating managers the game has ever produced.
O'Brien won three League of Ireland titles with Shamrock Rovers before catching the eye of Manchester United manager Ron Atkinson in 1986. The move came after a series of high-profile performances — including a notable outing against Celtic in the European Cup — with Arsenal also registering their interest.
"The manager said to me, look, we have a lot of interest now from Manchester United, plus Arsenal want to sign you," O'Brien told Football Presse. "I was delighted with myself."
He arrived at Old Trafford in October 1986, becoming Atkinson's last signing before the United board moved to replace him with Aberdeen's Alex Ferguson. The managerial change could have derailed O'Brien's prospects entirely, but Ferguson offered early reassurance.
"He said to me, 'Liam, I tried to sign you when I was at Aberdeen.' I was delighted with that. He must have seen something in me as a young player playing over in Ireland."
O'Brien made his debut in December 1986 and found himself in the company of some of the finest players of the era. None left a deeper impression than Bryan Robson — the powerhouse United and England captain who was widely considered one of the best midfielders of his generation.
"I didn't realise how good he was until I actually trained with him every day," O'Brien said. "He had everything in his locker. He could defend, he could attack, his passing ability was very good, he was tenacious in the tackle. For me, he was an all-round player. If I'm half the player he is, I'll be doing okay."
O'Brien had already earned international recognition before setting foot in Manchester. Jack Charlton — the World Cup-winning England centre-back who took charge of the Republic of Ireland in 1986 and famously promoted League of Ireland talent in his early squads — handed O'Brien his senior debut while he was still at Shamrock Rovers. He went on to win 16 caps and was part of Ireland's squad at UEFA Euro 1988, the country's first major tournament. "I was involved in that squad for ten years on and off," he said. "To be picked in a squad of 22, 24 players was an absolute honour."
The Ferguson era at United was beginning to take shape around O'Brien. He watched new arrivals like Brian McClair — the Scottish striker who scored over 20 goals in his debut season — and the returning Mark Hughes, who had left for Barcelona before coming home to Old Trafford, raise the level around him. "Bringing Hughes back was a masterstroke," O'Brien said. "Everyone knew how good he was before he left. McClair was a great signing too — he worked hard for the team and he put the goals in."
Yet for all the promise around him, O'Brien's time at United ended in a contract dispute that came down to a matter of pounds per week. Ferguson offered a renewal, but the terms fell well short of what O'Brien felt he deserved. "He offered me an awful lot less. I only wanted £500 a week. He dug his heels in, I dug my heels in." Newcastle United came calling, meeting him at a motorway service station in Leeds and offering a three-year deal at nearly triple his United wages. "I thought I'd won the lottery," he laughed.
He left United having made nine appearances, moving to Newcastle in November 1988, where he would go on to make over 150 appearances for the club. Coaching roles later followed at Bohemians, Shamrock Rovers, Hibernian and Sligo Rovers.
Pass Master by Liam O'Brien with Jimmy Geoghegan is available now.