[2] After completing his studies, Ryan played with the Collegians club, whom he captained to Dublin SHC victories in 1917 and 1918, before relinquishing the captaincy and winning a third title in 1919.
[3] The success of the Collegians club resulted in Ryan being made captain of the Dublin senior hurling team in 1917.
He later spent three years as house surgeon at Jervis Street Hospital before setting up his own private practice.
Ryan became the first medical officer to the Dublin Metropolitan branch of the Garda Síochána when the force was set up in 1922.
[6] Ryan died at St Vincent's Private Nursing Home, Dublin on 1 April 1943, at the age of 53.