The clubs after him are League One's Walsall, League Two side Wycombe Wanderers and at least one unnamed Championship side.
Wycombe are the only club to go public with their interest, with former Saint Paul Lambert - the Chairboys manager - believed to have offered him a deal in the course of the past few days.
Meanwhile, Saints signing target Craig Dargo did not sign for Motherwell today as expected - although new manager Mark McGhee has confirmed his interest in the former Inverness Caley Thistle striker.