James Horan has called time on his four-year tenure as manager of the Mayo senior footballers following the loss to Kerry in the All-Ireland SFC semi-final replay.
After guiding his club, Ballintubber, to a county final appearance, Horan was named as John O'Mahony's successor in October 2010.
O'Mahony's final year in charge saw the Green and Red lose to Sligo in the Connacht championship and to Longford in the qualifiers.
Horan's arrival had an immediate impact as the team regained the provincial title in 2011.That was the first of four Nestor Cups won under his stewardship.
However, All-Ireland success was to remain elusive with defeats to Donegal and Dublin in successive finals.
Hopes were high that Mayo could again reach the September decider this year but they just fell short against the Kingdom in Saturday's pulsating semi-final replay at the Gaelic Grounds.