Kerim signed his first professional contract with Fulham in November 2010 and signed an extension in March 2012 keeping him at Craven Cottage until the summer of 2015, with the option for the Club to extend by a further year.
During the 2010/11 season the Swiss youth international was an ever present member of Fulham's U18 Team that reached the Academy League Final.
After just 18 months at the Club, the Academy graduate made his First Team debut on July 7th 2011 as a second half substitute in the UEFA Europa League.
Martin Jol introduced Frei in the 71st minute as Fulham played out a 0-0 draw against NSI Runavik in the Faroe Islands.
In mid-September Martin Jol handed Frei a starting place in Fulham's eleven to face Chelsea in the 3rd Round of the Carling Cup.
The young winger was arguably Fulham's Man of the Match at Stamford Bridge, giving Chelsea's defence a torrid time all evening with his pace, trickery and direct approach to goal down the left flank.
Frei's rapid rise to prominence continued with another fine cameo performance against Swansea City in December, winning Fulham a penalty with a sublime piece of skill in the area.
On April 9 2012 Frei delivered a Man of the Match performance in the West London derby at Craven Cottage as Martin Jol's Team came from behind to draw 1-1 with Chelsea.
Frei made over 20 appearances at First Team level last season and Fulham have clearly unearthed a major talent who is set to light up Craven Cottage in the years to come.
Fulham Record
| Season | League | FA Cup | Carling Cup | UEFA | Total |
| | App | Goals | App | Goals | App | Goals | App | Goals | App | Goals |
| 2011-2012 | 15 | 0 | 1 | 0 | 1 | 0 | 7 | 1 | 24 | 1 |
| 2010-2011 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |