The Roscommon team shows one change from the side that defeated Leitrim in the first round of the Connacht SFC.
David Keenan, who received a shoulder injury in that game, is replaced by David Casey.
Casey missed the latter stages of the NFL because of a knee injury but has recovered fully from that complaint and is fit to take his place.
Paul Gleeson, who replaced Keenan in the Leitrim game, drops to the bench as a result of Casey’s selection
Senan Kilbride, who suffered a foot injury in the Leitrim game, has recovered and takes his place at full forward.
Paul Freeman comes into the subs as a result of his performances with the Roscommon junior side that retained their Connacht junior crown.
Roscommon have defeated Mayo once in the Championship this decade, in the Connacht SFC final of 2001.
Roscommon XV v Mayo in the Connacht SFC semi-final in Castlebar, Saturday, 5.00pm:
Geoffrey Claffey; Peter Domican, John Nolan, Paul Kelly; Sean McDermott, David Flynn, David Casey; Michael Finneran, Brian Higgins; Gary Cox (C), Karol Mannion, Donal Shine; Conor Devaney, Senan Kilbride, John Dunning