 Among the newcomers, Andersson made the biggest impact for Hammarby during the same season, establishing himself as a regular.He scored a brace, his first ever goals for Hammarby, on 2 May 2004 in a 2-1 win against Örebro SK on away turf.Weeks later, Andersson scored the lone goal in a 1-0 derby win against fierce rivals AIK on Råsunda.