Sources used: Padraig Ferguson’s Archive, Wikipedia, The Road to 51
The NFL did not take place in the 1926/7 season.
FIRST ROUND: Mayo 2-3 Sligo 1-8 (Castlerea, 29/5/1927). [According to The Road to 51, the Connacht Council ordered this match, won by Sligo, to be replayed on the grounds that the game did not start at the agreed time. Team and scorer details unavailable.]
FIRST ROUND (REPLAY): Sligo 0-1 Mayo 1-1 (Sligo, 19/6/1927). MAYO: M McLoughlin; W Donohue, D Creagh, F Shouldice; J Hunt, F Doherty, J Regan; M Mulderrig, J Forde; JJ Walsh, M Barrett, F Patten; G Courell, J McGahern, T Forde. [Match abandoned following a disputed goal for Mayo after 12 minutes. Sligo withdrew from the championship and Mayo were awarded the tie.]
SEMI-FINAL: Galway 1-5 Mayo 1-4 (Tuam, 17/7/1927). MAYO: M McLoughlin; W Donohue, D Creagh, F Doherty; F Shouldice, J Regan, TJ Hanley; M Mulderrig, J Forde; JJ Walsh, J McGahern, F Patten; G Courell, T Forde, M Barrett. Sub: JE McEllin (1-0). [All points unattributed]
Mayo 2-7 Sligo 1-5 (Claremorris, 24/4/1927). [This appears to be the first ever NFL fixture played in by Mayo. Team and scorer details unavailable.]
Mayo 2-5 Roscommon 1-6 (Claremorris, 8/5/1928). Mayo scorers: D Creagh (1-1), J Henry (0-2), G Courell (0-1). [Other scores unattributed. Team details unavailable.]
Mayo 0-9 Leitrim 0-8 (Roscommon, 18/9/1927). MAYO: M McLoughlin; F Shouldice, J Kenny, B Coleman; T Tunney, D Creagh, J Regan; M Mulderrig, J Forde; F Patten, M Barrett, JE McEllin; G Courell, M Ormsby, J McGahern. [All scores unattributed]