Background
Gallagher was born in Crediton, Devon, and originally played for the Plymouth Argyle youth academy.
Gallagher was born in Crediton, Devon, and originally played for the Plymouth Argyle youth academy.
Southampton
In April 2012 he joined Southampton amidst reported interest from fellow Premier League clubs Everton and Newcastle United. The striker made his debut for the Southampton first team on 6 November 2013 in the League Cup against Sunderland, coming on as an 79th-minute substitute for Gastón Ramírez. He made his full senior debut for the club on 28 January when he started in a league match against leaders Arsenal, coming close to scoring his first league goal on a number of occasions.
On 10 May 2014, Gallagher was awarded with a long-term contract extension with the Saints until the summer of 2018.
Milton Keynes Dons (loan)
On 29 July 2015, Gallagher joined Championship side Milton Keynes Dons on a season-long loan. He was recalled by Southampton on 6 January 2016.
Having previously played for Scotland at under-19 level, in February 2014 Gallagher switched allegiance to his birth country, England. On 24 February 2014, he was called up by England under-19s for a friendly match against Turkey.
Originally a member of the Plymouth Argyle youth academy, Gallagher joined Southampton in 2012 and earned a call-up to the first team at the beginning of the 2013-2014 season.