[1] Loyola's father, who helped found the Na Fianna club in 1955, had emigrated from Cavan and begun a clothes wholesale business in Ranelagh.

[1] Jim Gavin named Cooper as captain of the 2010 Dublin under-21 football team when he was manager.

[4] In early 2011, Cooper required surgery on a shoulder but kept playing in the hope that Pat Gilroy would call him into his Dublin squad.

[1] Cooper was part of the Dublin team that defeated Tyrone by 0–18 to 0–17 to win the 2013 National Football League, with Gavin having by then been appointed manager.

[5][6][7][8] He was then part of the Dublin team that beat Mayo by 2–12 to 1–14 in the 2013 All-Ireland Senior Football Championship Final.

[1] Mick Bohan — then part of the Dublin management team — and Gavin visited Cooper in the Mater Hospital.

[1] A foot injury sustained during club month in April led to Cooper being sidelined for the 2019 Leinster Senior Football Championship.

[4] He began to slip down the ranks with Dublin, appearing as part of the "B" team during training games.