Robert Hennelly, who was Mayo's first choice goalkeeper for the 2011 Championship, is back training with the county panel ahead of Sunday's Connacht SFC final.
Mayo manager James Horan may have to throw the recalled Hennelly straight into the action against London this weekend as his regular stoppers this season, David Clarke and Kenneth O'Malley, are both nursing injuries.
Clarke picked up a hamstring injury in the semi-final win over Roscommon last month and O'Malley is also troubled by a knock, leaving Hennelly as the only fully fit 'keeper at Horan's disposal.
The Breaffy clubman's last Championship appearance was in the 2011 All-Ireland semi-final defeat to Kerry. The 23-year-old was forced to leave the Mayo squad this time last season due to work commitments in Dublin.
Hennelly returned for training last weekend and played in an 'A' versus 'B' trial match on Sunday, during which midfielder Barry Moran picked up a knock.
Horan is also monitoring the fitness of Donal Vaughan (hamstring) ahead of the provincial decider, but fellow hamstring injury victim Keith Higgins came through the trial game unscathed and Cillian O'Connor and Mickey Conroy also trained successfully and could both make the squad for the final.