Derry's rejuvenation continued as they claimed a 2-13 to 1-6 win over Mayo in the All-Ireland Football qualifier.
Enda Muldoon (right) wins the ball ahead of David Heaney
The Oak Leafers led 0-4 to 0-0 although Barry Gillis' error then gifted a goal to Mayo full-forward Barry Moran.
Enda Muldoon's superb midfield play helped Derry regroup to lead 0-8 to 1-3 at the interval at Celtic Park.
Mayo levelled after half-time but Colin Devlin's goal deflated the visitors and rampant Derry notched a series of late scores including a classy Muldoon goal.
Muldoon had not been included in the Derry selection announced in midweek but he was a late inclusion in place of Mark Lynch.
Derry showed industry right from the start with four early points including superb efforts from play courtesy of James Conway and Barry McGoldrick.
However, Mayo struck back against the run of play in the 15th minute when Derry goalkeeper Gillis spilled a long ball which allowed Barry Moran to find the net from close range.
Conor Mortimer then levelled for the visitors as Derry's good early work was undone.
However, Gilligan and Devlin points edged Derry two ahead again although Derry's shaky looking defence had an escape when Barry Moran blasted over the bar when a goal seemed on.
The towering Moran continued to cause problems for the Derry defence while some strong running right down the centre also put the Oak Leaf rearguard in peril on a number of occasions.
Mayo boss John O'Mahony sees it all going wrong for his side
With Derry looking their early impetus, manager Paddy Crozier introduced Mark Lynch for Barry McGoldrick before half-time in an apparent attempt to keep Mayo half-back Trevor Mortimer in check.
Lynch's jinking run set up the last score of the first half as Gilligan pointed to leave Derry 0-8 to 1-3 ahead at the break.
Mayo had the better of the exchanges immediately after half-time with substitute Aidan Kilcoyne and Pearse Hanley pointing to bring the sides level.
One wondering whether it was going to be Derry's day when Lynch missed a glorious goal chance.
However, Mayo suffered a blow when lively substitute Kilcoyne had to depart because of an ankle injury.
The crucial score of the match came moments later when good work by Muldoon and James Conway set up Devlin's goal with the young Oak Leaf forward nipping in ahead of Mayo goalkeeper David Clarke to flick the ball to the net.
The goal completely knocked the stuffing out of Mayo while Derry grew in confidence.
Andy Moran pointed on 54 minutes to cut Derry's lead to two but it proved Mayo's last score.
Paddy Bradley hit four of Derry's next five points with substitute Raymond Wilkinson also getting on the scoresheet.
By that stage, Mayo's defence had goal AWOL and Muldoon helped himself to the final score of the match in the 68th minute with a lobbed finished over Clarke from 20 metres.
Derry: B Gillis, M McGoldrick, K McCloy, G O'Kane, L Hinphey, SM Lockhart, F McEldowney, F Doherty, J Conway, B McGoldrick, P Murphy, E Muldoon, C Devlin, Paddy Bradley, C Gilligan.
Mayo: D Clarke; T Cunniffe, L O'Malley, T Howley; D Heaney, D Kilcoyne, T Mortimer; P Harte, D Brady; B J Padden, P Hanley, A Dillon; C Mortimer, B Moran, A Moran.
Bank of Ireland All-Ireland Football Qualifiers (Saturday 14 July)
Derry 2-13 1-6 Mayo
Westmeath 1-8 1-13 Donegal
Kildare 1-10 1-16 Louth
Meath 0-11 0-9 Fermanagh
Tommy Murphy Cup semi-finals (Saturday, 14 July)
Clare 0-10 1-11 Antrim
Wicklow 2-15 0-14 Waterford
Guinness Liam McCarthy Cup qualifiers
Galway 2-31 1-9 Antrim
Laois 1-11 2-14 Clare
Offaly 2-25 2-13 Dublin
Tipperary 2-16 1-18 Cork
Christy Ring Cup
Westmeath 1-14 1-11 Kerry
Down 2-12 1-21 Meath
London 3-10 2-16 Carlow
Derry 3-20 3-12 Wicklow
Nicky Rackard Cup quarter-finals
Roscommon 4-20 1-8 Monaghan
Louth 4-25 1-3 Warwickshire
Armagh 2-19 1-9 Tyrone
Donegal 2-14 2-8 Longford
ESB Ulster Minor Football Final
Tyrone v Derry (Casement Park, 1220)
Bank of Ireland Ulster Senior Football Final
Tyrone v Monaghan (Clones, 1415)
Leinster Senior Football Final
Dublin v Laois (Croke Park, 1615)