Ex-Premier League star DJ Campbell is one of six people questioned by police in connection with allegations of fixing in football matches.
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Mr Campbell, who now plays for Championship side Blackburn, was one of six people arrested on Sunday.
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That came after ex-Portsmouth player Sam Sodje told an undercover Sun on Sunday reporter he could arrange yellow and red cards in exchange for cash.
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Five people were bailed on Sunday and a sixth person was bailed on Monday.
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Portsmouth Football Club said it was "shocked and saddened" by the claims.
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Mr Campbell, 32 - whose full name is Dudley Junior Campbell - played in the Premier League for Birmingham, Blackpool and QPR.
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Blackburn Rovers FC said in a statement: "Following reports in today's national media, Blackburn Rovers can confirm that striker DJ Campbell has been arrested.
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"The club will be making no further comment on what is now an ongoing legal matter."
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The BBC has learned that discussions are ongoing between Blackburn Rovers, their lawyers and representatives of Mr Campbell over his future at the club.