O'Shea can play on the right-hand side of midfield or as a striker, and scored 10 goals for Galway last season.
The 20-year-old has scored one goal in three appearances for the Irish Under-21 side.
Jose Mourinho discussed being under pressure, rumours of dissent within his Chelsea squad - and did not talk about Dr Eva Carneiro.
Press Association Sport's Declan Warrington takes a look at the main talking points in the Premier League this weekend.
Crystal Palace v West BromSaido Berahino has gone from hero to villain and back to hero again since the end
This week former Borussia Dortmund manager Jurgen Klopp rejected the chance to take over the Mexican national team.
10) Luis Suarez 4 Months Suarez was banned for biting Italy defender Giorgio Chiellini at the World Cup during a group match for Uruguay.
The Football Association instigated a four-game tour of Germany and Austria by a representative England team in November 1899.