Sources used: Padraig Ferguson’s Archive, The Road to 51
FIRST ROUND: Mayo 0-24 Roscommon 0-1 (Castlerea, 20/11/1921). [According to The Road to 51, this scoreline is misleading as Mayo scored 4-5 when playing with the wind in the first half but contemporaneous newspaper reports only refer to a points total for the team of 0-24. Team and scorer details unavailable.]
See the 1922 and 1923 records for details of the remainder of Mayo’s 1921 championship campaign.