The Italian spent time as a youngster with Napoli and Manchester City before joining Fulham where he graduated as a professional.
A youth international with Italy, Trotta has spent successful loans away from Craven Cottage with Wycombe and Brentford - helping the latter to promotion last term with 12 goals in League One.
The 22-year-old received clearance this morning to partake in today's game and is expected to go straight into the squad to face Sheffield United.
