The experienced defender was last night cleared of the straight red card issued to him in the Connacht champions’ quarter-final win over Donegal.
Keane, a 70th minute substitute in Mayo’s 2-13 to 0-11 win, was dismissed two minutes later by referee David Gough, ruling him out of the clash with Dublin.
But the Westport man, a starter in the 2012 All- Ireland final loss to Donegal, argued his case successfully to a Central Hearings Committee meeting at Croke Park last night.
A Mayo GAA statement confirmed that Keane’s red card was downgraded to a yellow card offence, clearing him to return to duty for the county immediately.
Keane is unlikely to start against the All-Ireland title favourites in what will be a repeat of the 2013 decider won by Dublin but will provide vital cover for May’s joint bosses Pat Holmes and Noel Connelly.