The 32-year-old midfielder was a free agent after leaving English League Two side Northampton Town, where he played 67 games in the last two seasons.

He was previously at Newport County, Yeovil Town, Shrewsbury and Port Vale.

Foley is set to be joined by young Hull City defender Sean McLoughlin and former Oxford United striker Jonathan Obika, who will sign a two-year deal.

Manager Jim Goodwin believes Foley can be a key influence as St Mirren bid to avoid a Scottish Premiership relegation struggle.

"Sam is a good, experienced central midfielder," Goodwin said. "He gives us a bit of aggression, has good energy and is a very tidy footballer.

"We can't have enough of those types of players. You need good, honest, experienced professionals who are going to bring out the best in the younger kids."

Foley joins fellow signings Dean Lyness, Tony Andreu, Oan Djorkaeff and Ilkay Durmus as Goodwin, who took charge at the end of June, reshapes the squad that only avoided relegation via the play-offs.