Fir Park star held over conspiracy to defraud.
Motherwell midfielder Steve Jennings has been arrested over an investigation into betting irregularities.
The 26-year-old was seized by Merseyside Police at his home in Glasgow with eight others were arrested across Merseyside.
Police said they had been arrested for conspiracy to defraud in relation to a game between Motherwell and Hearts on December 14 last year.
Concerns were raised at the time by the Association of British Bookmakers after a number of bets from the Liverpool area were placed on there being a sending off.
During the match Jennings, who had already been booked, was shown a straight red card for foul and abusive language aimed at referee Stevie O’Reilly late in the 2-1 home defeat.
Scottish Football Association chief executive Stewart Regan confirmed the arrest and says it follows “extensive enquiries” by the Gambling Commission.
“While the investigation involves several individuals outwith Scotland, it is important to stressthe evidence gathered has involved only one Scottish match,” he said.
“Motherwell FC are aware of the situation and will issue a response in due course. The Scottish FA will make no further comment at this stage.”
Merseyside Police said: “Detectives have today executed warrants at 10 addresses across Merseyside and Glasgow and arrested nine men as part of an investigation into suspicious betting activity.
“The arrests are the culmination of a joint operation with the Gambling Commission and the nine who have been arrested for conspiracy to defraud are being interviewed by detectives.
“Those arrested are a 29-year-old from Bootle, a 48-year-old from West Derby, a 54-year-old from Norris Green, a 26-year-old from Croxteth, a 22-year-old from Kirkdale, a 31-year-old from Litherland, a 68-year-old from Fazakerley, a 36-year-old from Kirkby and a 26-year-old from Glasgow.
“The investigation relates to a match between Motherwell and Hearts on December 14, 2010.”