Fox first played competitive Gaelic football with the Dunmore McHales club.
Fox made his debut on the inter-county scene when he was selected for the Galway junior team.
He enjoyed one championship season with the junior team, culminating with the winning of an All-Ireland medal in 1931.
After being selected for the Connacht inter-provincial team for the first time in 1934, Fox was a regular choice on the starting fifteen for the following few seasons.
The Army side based in Renmore were the first team to lift the Frank Fox Cup.