George O'Callaghan agrees Cambridge United deal
Cambridge United have signed Irish midfielder George O'Callaghan on non-contract terms after a short trial.
The 31-year-old joined League of Ireland First Division side Cork for a third time in the summer, but left the club before the turn of the year.
He started his career at Port Vale before spells at Ipswich, Brighton, Tranmere and Yeovil.
Brentford gave him a two-week trial in February but he has remained a free agent since departing Cork.