First featuring for his county at senior level under the management of Rory Gallagher, he made his senior debut in the 2016 Dr McKenna Cup match against Down.[10] Bán Gallagher went on to make a number of appearances during Donegal's Division One campaign in the 2016 National League: first as a substitute against Cork in the second round of fixtures,[11] then starts against Kerry[12] and Roscommon,[13] a substitute appearance against Dublin[14] and a substitute appearance in the league semi-final defeat to Dublin.[15] He made a substitute appearance against Tyrone in the final of the 2016 Ulster Championship.[16]
Under the management of Declan Bonner, Bán Gallagher continued to prosper. He won the 2018 Ulster Championship, scoring Donegal's opening goal in the final.[21] He had previously started the preliminary round against Cavan, the quarter-final against Derry and the semi-final against Down.[22][23][24] He appeared at left corner-back on The Sunday Game Team of the Year 2018.[25] He was also nominated for an All Star.[26]
Donegal qualified for the 2019 National Football League Division 2 final and Gallagher started the game as Donegal defeated Meath to win the title.[27]
Gallagher added another Ulster medal in June 2019, scoring a point as the Tír Chonaill men retained their title with an eight point win over Cavan in the final.[28] He had previously started against Fermanagh in the quarter-final and Tyrone in the semi-final.[29][30] On 18 July 2019, BBC Sport reported that Gallagher had been ruled out for the remainder of the season after sustaining a broken ankle during a training session on the previous evening.[31] He had just completed the championship victory over Meath the previous weekend.
Style of play
Bán Gallagher is regarded as a top ball carrier.[32] Though predominantly placed in defensive positions, he has been known to get forward and score goals for his team.[32][21] He is noted for his white footwear when on the field of play.[32]
^Ferry, Ryan (29 October 2020). "No excuses for Eoghan Bán". Donegal News. p. 60. Gallagher also enjoyed a spot of reading during the [COVID-19 pandemic-enforced] break, and is willing to shoulder more responsibility. He was one of the star players in the Donegal minor team that reached the All-Ireland Final in 2014. However, he is 24 now and appreciates that the younger generation can't rely on the older guard to provide all the leadership. 'I read a few books during the lockdown. It was not something I would normally do.'… Donegal and Tyrone know each other well, and Gallagher played with some of their players when at college in Ulster University, Jordanstown… 'Definitely, Conor McKenna was my age at minor, I'd phave played against him and Declan [Bonner] managed'.
^Craig, Frank (29 April 2021). "Eoghan Bán wants a tailored season". Gaelic Life. Retrieved 29 April 2021. 'Luckily, myself and Hugh McFadden were able to batter away together. We share a house in Donegal Town'. Also published as "Eoghan Bán Gallagher a big fan of tailored inter-county season" in the Donegal News of the same date, 29 April 2021: pp 60–61.
^Craig, Frank (17 February 2022). "Kerry are a serious test — Eoghan 'Ban' Gallagher". Donegal News. p. 69. 'I'm a big Liverpool fan and I listen and read of[sic] a lot of what Jurgen[sic] Klopp has to say. He always talks about finding a rhythm and a pattern of play'.