Career
Milan
Born in Freetown, Strasser began his career at local club Kallon, before moving to Italy to join Milan in 2007. Genoa
On 20 July 2010, Milan announced that half of the rights to Strasser had been purchased by Genoa for €2.25 million, as part of the deal that saw defender Sokratis Papastathopoulos move to Milan. However, Strasser would stay at Milan on loan, joining the first-team squad permanently.
Milan return
In May 2011, his co-ownership was dissolved in favour of Milan for the same price and renewed his contract to June 2016.
(with Papastathopoulos moved back to Genoa), but Strasser subsequently joined Lecce on loan. He appeared in 13 games and scored one goal for his new team, before suffering a broken ankle in a game against Juventus on 9 January and subsequently being called back to Milan to undergo rehabilitation.
At the start of the following season, Strasser sustained another injury which would rule him out for three months. After recovering he struggled to get playing time, making only one Coppa Italia appearance before being loaned out to Parma during the January transfer window.
Genoa return
On 27 July 2013, Strasser joined Genoa on a permanent deal for €3.5 million, as part of Kevin Constant"s co-ownership resolution in favour of Milan for €6 million.
He was loaned out to Serie B team Reggina in August 2013. Strasser made his international debut for the Sierra Leonean national team on 5 September 2010, in a 2012 Africa Cup of Nations qualification game against Egypt.