He plays for Seán Mac Cumhaills and, formerly, the Donegal county team.
He won the 2011 Lory Meagher Cup with his county, starting and completing the final.
[1][2] He won the 2013 Nicky Rackard Cup, starting and completing the final.
[3][4] He also won the 2018 Nicky Rackard Cup, starting the final before being substituted at half-time.
[6] Donnelly was part of the county management team in 2021, but had left this role by early 2022.