On 7 October 2017, Ryan lined out at midfield when Kanturk qualified to play Mallow in the Premier Intermediate Championship final.
[3] On 19 November 2017, Walsh won a Munster Club Championship medal with the hurlers after lining out at midfield in the 1-23 to 0-25 extra-time defeat of Kilmaley in the final.
[4] On 4 February 2018, he won an All-Ireland medal after scoring 1-02 from play in a 1-18 to 1-17 defeat of St Patrick's Ballyragget in the final.
On 3 July 2019, Walsh made his first appearance for Cork's inaugural under-20 team in a 1-20 to 0-16 defeat of Limerick in the Munster Championship.
[8] Walsh was again selected at midfield when Cork faced Tipperary for a second time in the All-Ireland final on 24 August 2019.