Career
He currently plays for the Tampa Bay Rowdies in the North American Soccer League. Professional
Alhassan began his career with Ghana Premier League side Liberty Professionals in 2007, helping the club to the semifinals of the 2009 WAFU Club Championship. In 2010, Alhassan signed with Portland Timbers of the USSF Division 2 Professional League, in hopes of staying with the club in 2011 for their inaugural season in Major League Soccer, the top tier of the United States soccer pyramid.
In his first start for the Timbers, Alhassan scored in second-half stoppage time to give Portland a 1–0 victory over Puerto Rico Islanders.
In 2011 Alhassan became the third player in Major League Soccer history to open his career with assists in each of his first three home games, all Timbers wins. He scored his first Master of Library Science goal for the Timbers on the opening weekend of the 2012 Master of Library Science season, chipping the ball over Philadelphia Union goalkeeper Zac MacMath to seal the Timbers" victory at 3-1.
In addition to his goal, Alhassan assisted on another goal and earned the free kick which led to the equalizing goal. Alhassan played 1,867 minutes in 28 matches in 2015 for Minnesota United Football Club. On December 17, 2015, Alhassan was released by Minnesota and picked up by the Tampa Bay Rowdies.
International
Alhassan began his international career in 2007 with the Ghana U-17 national team
In May 2008 Alhassan was also called into a camp with the Ghana national team for the 2009 African Nations Championship, again missing out on the final squad.