Career
He played at the point guard position. Hamann started his professional career in 1998 at Brose Baskets"s development team Turn- und Sportverein Tröster Breitengüßbach. From 2006 to 2007 he played on season for Climamio Bologna in italian Serie A. After his short stint in Italy he returned to Bamberg in January where he played the rest of the 2006-2007 and 2007-2008 seasons.
In 2008 he joined Alba Berlin where he played until 2010.
In 2010 he signed with Bayern Munich and became the captain of the team He played there until 2014.
In his last season he led Bayern together with star player Malcolm Delaney to its first championship since 1955 and to the Euroleague Top 16 stage. 6 after the season. In his last professional season he played for Young Pikes Baunach in german second division ProA.
The former captain of the German national team made his debut on 22 January 2003 in a game against Macedonia.
He played at 2003, 2007, 2009 and 2011 EuroBasket and at 2006 and 2010 International Basketball Federation Basketball World Cup.
In 2008 he led the team together with 13-time National Basketball Association All-Star Dirk Nowitzki to their first Summer Olympic Games since 1992 Summer Olympics. In all competitions he averaged 5.3 points, 1.8 rebounds and 2 assists per game.