In the 2019 season, Magherafelt reached the final of the Derry Senior Football Championship for the first time since 1983.[4] On 20 October, McCluskey was in the half-back line for the final against Glen. McCluskey scored a point in the second half, and Magherafelt held on to win by 0–12 to 0–11.[5] Magherafelt reached the final again in 2020, playing Slaughtneil. McCluskey scored a point but Slaughtneil won the match by four points.[6] McCluskey played in his third county final in 2023, with Magherafalt facing Glen once again. The match was level at half-time, but a strong second half from Glen helped them to the title.[7]
Inter-county
Minor and under-20
On 17 July 2016, McCluskey was at corner back as the Derry minor team faced Donegal in the Ulster final. Donegal were winners by 2–10 to 1–11.[8] Derry lost the All-Ireland quarter-final by eleven points to Munster champions Kerry.[9]
McCluskey played in his second Ulster final in 2017, lining out at full back against Cavan. Derry won the final by 1–22 to 2–12.[10] On 27 August, Derry beat Dublin by three points to reach the All-Ireland final.[11] The final against Kerry took place on September 17, with McCluskey lining out at full-back. McCluskey was replaced at half-time as Kerry's David Clifford led the Kingdom to a comfortable win.[12][13] McCluskey was named at full-back on the inaugural minor team of the year at the end of the season.[14]
On 24 June 2018, McCluskey was at centre-back for the Ulster Under-20 final against Armagh. Derry were seven-point winners.[15] On 14 July, McCluskey lined out at full back for the All-Ireland semi-final defeat to Mayo.[16] Derry were in the Ulster under-20 final again in 2019, facing Tyrone on 14 July. Tyrone won the match by 4–13 to 1–10.[17]
Senior
McCluskey joined the Derry senior panel in 2018. McCluskey made his National League debut on 24 February, coming on as a substitute in a loss to Fermanagh.[18] Derry won the Division 4 title in 2019, but McCluskey didn't feature in the final.[19] On 19 June 2021, McCluskey was at corner back for the Division 3 league final against Offaly. Derry won the match by 0–21 to 1–6.[20] McCluskey made his championship debut on 11 July, coming on as a substitute in a one-point loss to Donegal.[21]
On 1 May 2022, McCluskey made his first championship start as Derry inflicted an eleven-point defeat on reigning All-Ireland champions Tyrone.[22] McCluskey played in the semi-final win over Monaghan as Derry reached the Ulster final.[23] The Ulster final took place on 29 May, with Derry facing Donegal. McCluskey played the entire game as Derry claimed an extra-time victory to win their first provincial title since 1998.[24] Derry's championship came to an end at the semi-final stage, losing by five points to Galway.[25] McCluskey received his first All-Star nomination at the end of the season.[26]
In 2023, Derry secured promotion to Division 1 after winning their first six games,[27] and went on to face Dublin in the Division 2 final on 2 April. Dublin won the match by 4–6 to 0–11.[28] In the Ulster Championship semi-final, McCluskey scored his first championship goal against Monaghan as Derry reached back-to-back provincial finals.[29] On 14 May, McCluskey played the entire game as Derry beat Armagh in a penalty shoot-out, defending their Ulster title.[30] On 16 July, McCluskey started the All-Ireland semi-final as Derry lost to defending champions Kerry.[31] After the All-Ireland final, McCluskey was named on The Sunday Game Team of the Year.[32] McCluskey was also named on the All-Star team for the first time.[33][34]
In the 2024 league, Derry topped the table, qualifying for the final against Dublin.[35] McCluskey started the final at corner back, and Derry won the league for the first time since 2008 after a penalty shoot-out win.[36]