He was the top scorer in the 2010 Fitzgibbon Cup helping Waterford Institute of Technology to finish as runners-up, he scored 1-11 in the final.
[5] On 21 October 2018, Hammersley scored 12 points as a full-forward for Clonoulty-Rossmore against Nenagh Éire Óg, leading to the team's first Tipperary senior hurling title since 1997.
[6] In a pitch-side interview with Raidió Teilifís Éireann, Hammersley paid tribute to the GAA as "the lifeblood of the whole of Ireland" in remarks described by the national broadcaster as "eloquent".
He wrote an article in an Irish journal speaking of his experience there, and severely condemning many of Israel's policies including the separation wall, the tourism and economic divide, Israeli settlements, refugee camps, and the system he accused of making Palestinians "second class citizen[s] in [their] own land.
In a wide-ranging interview with the Times of Ireland, Hammersley went on record with his belief that "you have a responsibility to speak out for people who are being oppressed.