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The former X Factor judge was cleared of brokering a cocaine deal in July last year following a newspaper sting led by Mr Mahmood, after Judge Alistair Mc Creath said there were "strong grounds" to believe The Sun On Sunday reporter lied in the witness box.
At the time Portsmouth said Sodje no longer played for the club, but they would co-operate fully with any investigation if approached by the authorities.
It was also claimed that Oldham player Cristian Montano failed to get a yellow card in return for money in a match against Wolves on October 22 and offered to take part in another rigging incident.
Blackburn striker DJ Campbell was confirmed to be one of the six players who were arrested in December 2013.
Last month, the CPS said it was re-examining criminal convictions in 25 cases where evidence was given by Mahmood and it had offered no evidence in three live cases where the undercover reporter was a prosecution witness.
Mahmood, a former reporter for the News of the World, was suspended by the Sun on Sunday after the collapse of Contostavlos's trial.
In September, several trials at Southwark Crown Court in London were halted because they relied on evidence from the undercover reporter.