|Irish name||Dónall Ó Muireasa|
20 April 1993|
Castleconnell, County Limerick, Ireland
|Height||6 ft 1 in (1.85 m)|
|University of Limerick|
|*Inter County team apps and scores correct as of 12:50, 28 September 2019.|
During his studies at the University of Limerick, Morrissey was selected for the college's senior hurling team. On 11 March 2015, he won a Fitzgibbon Cup medal as UL defeated the Waterford Institute of Technology by 2-18 to 1-14 in a replay of the final at Páirc Uí Rinn.
Morrissey joined the Ahane club at a young age and played in all grades at juvenile and underage levels before joining the club's senior team.
Morrissey first played for Limerick at minor level. He made his first appearance on 25 June 2010 in a 1-17 to 2-12 defeat by Clare in the Munster Championship. Morrissey was eligible for the minor grade again in 2011, however, his season ended with a 4-17 to 3-15 defeat by Waterford.
Morrissey subsequently joined the Limerick under-21 hurling team. He made his first appearance on 18 July 2012 in a 1-16 to 1-11 defeat by Tipperary. Morrissey's three successive seasons with the team ended without success.
Morrissey made his senior debut for Limerick on 23 February 2014, replacing Gavin O'Mahony for the final 12 minutes of a National Hurling League game against Antrim at the Gaelic Grounds. He was an unused substitute for the subsequent championship campaign.
On 19 August 2018, Morrissey was at left wing-back when Limerick won their first All-Ireland title in 45 years after a 3-16 to 2-18 defeat of Galway in the final. He ended the season by winning an All-Star Award.
On 31 March 2019, Morrissey was selected at left wing-back for Limerick's National League final meeting with Waterford at Croke Park. He collected a winners' medal following the 1-24 to 0-19 victory. On 30 June 2019, Morrissey won a Munster Championship medal at left wing-back following Limerick's 2-26 to 2-14 defeat of Tipperary in the final.