Roy Maurice Keane (born 10 August 1971) is an Irish former footballer and manager. In his 18-year playing career, he played for Cobh Ramblers in the League of Ireland, Nottingham Forest and Manchester United, before ending his career at Celtic in Scotland.
Regarded by some as one of the most memorable players of the Premier League era, Keane, a dominating central-midfielder, was noted for his aggressive and highly competitive style of play, an attitude which helped him excel as captain of Manchester United from 1997 until his departure in 2005, having first joined the club in 1993. Keane helped United achieve a sustained period of success in more than 12 years at the club.
He played at international level for much of his career, representing the Republic of Ireland over a period of fourteen years, most of which he spent as captain. He played in every game at the 1994 FIFA World Cup, although he was sent home from the 2002 World Cup after an incident with national coach Mick McCarthy.
During his first season as Sunderland manager, he took the club from twenty-third position in the Football League Championship to win the league and gain promotion to the Premier League. Keane's arrival was largely attributed as the catalyst for Sunderland's recovery. He managed to keep Sunderland from relegation in the 2007–08 season, but in his second season as a top-flight manager he left his position with Sunderland in the relegation zone. In April 2009, he was appointed as manager of Ipswich Town, but was sacked by the club in January 2011 with them 19th in the Championship.
From : www.wikipedia.org