Dennis Irwin, an Irishman, joined United in 1990, but 'only' managed an impressive 368 appearances.
No he is not joining Manchester United.
Roy keane
Ryan Giggs - 776 appearances
466 appearances finally it was 676 appearances
Tony Dunne Manchester United 1968
144
yes and he will be joining Manchester united
In 13 years between 1981 and 1994, Bryan Robson made 345 Premier League appearances for Manchester United, scoring 74 goals.
Bobby Charlton scored a total of 199 goals in 606 First Division appearances for Manchester United, 19 goals in 78 FA Cup appearances, 23 goals in 45 European appearances, and 7 goals in 24 League Cup appearances.
Cristiano Ronaldo played for Sporting CP before he was bought by Manchester United.
Yes
Luke Chadwick made a total of 38 appearances for Manchester United between 1999 and 2003, scoring 2 goals.