Some context: Keane was born into a working class family in Ballinderry Park, Mayfield, Cork. His father, Maurice, took work wherever he could find, which led to jobs at a local knitwear company and at Murphy's Irish Stout brewery, among others. His family were keen on sport, football especially, and many of his relatives had played for junior clubs in Cork, including Rockmount. Keane took up boxing at the age of nine and trained for a number of years, winning all of his four bouts in the novice league.
Despite the then-record transfer fee, there was no guarantee that Keane would go straight into the first team. Paul Ince and Bryan Robson had established a formidable partnership in the centre of midfield, having just inspired Manchester United to their first league title since 1967. Robson, however, was 36 years old and in the final stages of his playing career, and a series of injuries kept him out of action for most of the 1992-93 season and into the 1993-94 season. As a result Keane had an extended run in the team, scoring twice on his home debut in a 3-0 win against Sheffield United, and grabbing the winner in the Manchester derby three months later when United overturned a 2-0 deficit at Maine Road to beat Manchester City 3-2.  Keane had soon established himself as a first choice selection, and by the end of the season he had won his first trophy as a professional as United retained their Premier League title. Two weeks later, Keane broke his Wembley losing streak by helping United to a 4-0 victory over Chelsea in the FA Cup Final, sealing the club's first ever "double".  The following season was less successful, as United were beaten to the league title by Blackburn Rovers and beaten 1-0 in the FA Cup final by Everton. He received his first red card as a Manchester United player in a 2-0 FA Cup semi-final replay win against Crystal Palace, after stamping on Gareth Southgate, and was suspended for three matches and fined PS5,000. This incident was the first of 11 red cards Keane would accumulate in his United career, and one of the first signs of his indiscipline on the field.  The summer of 1995 saw a period of change at United, with Ince leaving for Internazionale, Mark Hughes moving to Chelsea and Andrei Kanchelskis being sold to Everton. Younger players such as David Beckham, Nicky Butt and Paul Scholes were brought into the team, which left Keane as the most experienced player in midfield. Despite a slow start to the 1995-96 campaign, United pegged back title challengers Newcastle United, who had built a commanding 12-point championship lead by Christmas, to secure another Premier League title. Keane's second double in three years was confirmed with a 1-0 win over Liverpool to win the FA Cup for a record ninth time.  The next season saw Keane in and out of the side due to a series of knee injuries and frequent suspensions. He picked up a costly yellow card in the first leg of the Champions League semi-final against Borussia Dortmund, which ruled him out of the return leg at Old Trafford. United lost both legs 1-0, but this was compensated for by winning another league title a few days later.
When did he start playing?
A: 

Some context: Blur are an English rock band formed in Colchester in 1988. The group consists of singer/keyboardist Damon Albarn, guitarist/singer Graham Coxon, bassist Alex James and drummer Dave Rowntree. Their debut album Leisure (1991) incorporated the sounds of Madchester and shoegazing. Following a stylistic change influenced by English guitar pop groups such as the Kinks, the Beatles and XTC, Blur released Modern Life
After 13 and the subsequent tours in 1999-2000, band members pursued other projects. Graham Coxon recorded a string of solo albums, while Damon Albarn dedicated his time to Gorillaz, the animated band he had created with Jamie Hewlett. Alex James worked with Fat Les and co-wrote several songs with Sophie Ellis-Bextor and Marianne Faithfull.  Recording for Blur's next album began in London in November 2001, but concerted work started in June 2002, with the sessions moving to Marrakech, Morocco soon after, and then to Devon back in the UK. Not long after the sessions began, Coxon left the group. Coxon said "there were no rows" and "[the band] just recognised the feeling that we needed some time apart". Before the album was released, Blur released a new single, "Don't Bomb When You Are the Bomb" as a very limited white label release. The song is largely electronic, and was part of the band's protest against war in the Middle East. Albarn, however, attempted to assuage fans' fears that the album would be electronic by providing reassurances that the band's new album would be "a rockin' record", and also said that it has "a lot of finely crafted pop songs". Early in 2002, Blur recorded a song that would be played by European Space Agency's Beagle 2 lander once it touched down; however, attempts to locate the probe after it landed on Mars were fruitless.  Think Tank, released in May 2003, was filled with atmospheric, brooding electronic sounds, featuring simpler guitar lines played by Albarn, and largely relying on other instruments to replace Coxon. The guitarist's absence also meant that Think Tank was almost entirely written by Albarn. Its sound was seen as a testament to Albarn's increasing interest in African and Middle Eastern music, and to his complete control over the group's creative direction. Think Tank was yet another UK number one and managed Blur's highest US position of number 56. It was also nominated for best album at the 2004 Brit Awards. The band did a successful tour in 2003, with former Verve guitarist Simon Tong filling in for Coxon.  In 2005, XFM News reported that Blur would record an EP, and denied that they would hire a replacement guitarist for Coxon. There were also some aborted recordings made in 2005. Overall the band kept a low profile and did no studio or touring work as a three-piece. After Coxon significantly thawed on the subject of rejoining Blur, in 2007 band members announced that they would reunite, and that they intended to record together first in August, with the date later being pushed back to September, then October. Though the band members finally met up in October, they posted on their website that they had only "met up for an enjoyable lunch" and that there were no "other music plans for Blur".
Why did Coxon leave?
A:
After 13 and the subsequent tours in 1999-2000, band members pursued other projects.