Accra Hearts of Oak SC
Otoo's began his career club career in the Vision Soccer Academy and signed in January 2004 with Auroras FC. After four-and-a-half year with Auroras FC Otoo left the club to sign on 11 June 2008 for Accra Hearts of Oak SC. On 1 December 2009, Otoo joined Ghana Football Leagues club Red Bull Ghana prior to joining on 1 July 2010 Ghana Premier League club Wa All Stars in the 2010–2011 Ghanaian Premier League season.