Explosive claims about corruption in Pakistan's cricket team stunned a London courtroom Wednesday as three guilty players and their agent spoke out on each other's roles as they awaited sentence.

Judge Jeremy Cooke was due to pass sentence on Pakistan's former Test captain Salman Butt, fast bowlers Mohammad Aamer and Mohammad Asif, plus their agent Mazhar Majeed, whose guilty plea can now be reported.

They could each be jailed for up to seven years for conspiring to accept corrupt payments and up to two years for conspiring to cheat by arranging deliberate no-balls in a case that has rocked a sport rooted in ideals of fair play.

With the four stood in the dock, their lawyers sent claims and counter-claims flying across the packed Court 4 at Southwark Crown Court. Butt, 27, who became a father Tuesday for the second time just 30 minutes before being found guilty, watched as his lawyer said he admitted his career was over and he stood to lose his family.

The lawyer said Butt had approached Majeed in 2009 to get involved in fixing and that Butt and another player, who is not among the three in the dock, had taken him to a meal in March 2010 to push him into fixing. He said Majeed was introduced to a mysterious bookmaker called Sanjay, who was running the racket.

Majeed claimed that of the £150,000 ($240,000, 175,000 euros) he received from an undercover newspaper reporter with the News of the World tabloid, Asif got £65,000 and Butt £10,000. The judge then heard that Asif was given such a huge amount to keep him from joining another fixing racket.

Lawyers for Butt and Asif dismissed the claims about the sums of cash. Cooke also dismissed claims that Aamer was only involved in one episode of spot-fixing. He said that text messages sent from murky contacts in Pakistan suggested that the talented youngster was also implicated in fixing during the preceding Test at The Oval.

Aamer claimed he was being leant upon and feared for his future in national side if he did not take part in the conspiracy. "I refuse to accept that basis of plea on the material I have seen," Cooke said.

"There are certainly texts and the like which suggest that Aamer's first and only involvement was not limited to Lord's, it was not an isolated and one-off event," Cooke said.