Joe O'Brien-Whitmarsh (born 11 May 2005) is an Irish professional footballer who plays as a midfielder for EFL League Two club Accrington Stanley, on loan from Premier League club Southampton.
[3] He joined Premier League side Southampton in January 2024 from Cork City for an undisclosed fee.
[4] He was included in Southampton's match-day squad for the EFL Cup tie against Cardiff City on 28 August 2024, making his debut as a second half substitute.
[5][6] On 3 February 2025, O'Brien-Whitmarsh joined League Two side Accrington Stanley on loan for the remainder of the 2024–25 season.
[10] In November 2024, he received his first call up to the Republic of Ireland U21 squad for their two friendlies against Sweden U21 in Marbella, Spain.