[1][2][3] Walsh joined the Kanturk club at a young age and played in all grades at juvenile and underage levels as a dual player.
[7][8] On 19 November 2017, Walsh won a Munster Championship medal with the hurlers after a 1-23 to 0-25 extra-time defeat of Kilmaley in the final.
[9] On 4 February 2018, he won an All-Ireland medal after scoring two points in a 1-18 to 1-17 defeat of St Patrick's Ballyragget in the final.
On 1 July, Walsh won a Munster Championship medal after scoring three points in a 1-16 to 2-08 defeat of Kerry in the final.
He made his first appearance for the Cork minor hurling team when he lined out at midfield in a 2-17 to 2-16 defeat by Clare on 30 April 2008.
[16] On 3 August, Walsh was at left wing-forward for the Cork under-21 hurling team that faced Limerick in the Munster Championship final.
[20] Walsh ended the season by winning an All-Star award as well as being named Young Footballer of the Year.
[21] After playing in the early rounds of the National League, Walsh won a second successive winners' medal on 24 April 2011 in spite of missing Cork's 0-21 to 2-14 defeat of Dublin in the final.
[25] In November 2013, Walsh announced that he would line out for both the Cork senior hurling and football teams during the 2014 season.
[27] On 3 July, Walsh won a Munster Championship medal after scoring two points from midfield in Cork's 2-24 to 0-24 defeat of Limerick in the last final to be played at the old Páirc Uí Chaoimh.
[28] On 30 October 2014, Walsh ended his status as a dual player and committed to playing only inter-county hurling during the 2015 season.