After becoming Swedish champion twice in the 125cc category, in 1994 and 1995,[1] Stigefelt debuted in Grands Prix in 1997, racing in the 250cc class until 2000. In 2001 he had his only season in the premier class, the 500cc category, finishing twenty-second. After two more seasons spent in the 250cc class, Stigefelt moved to the Supersport World Championship in 2005, finishing eighth in 2006.
In 2005 he founded the Stiggy Racing team, that competed in the Supersport and Superbike World Championships until 2009.[2] From late 2011[3] to late 2012[4] he was the RW Racing GP team manager; in 2013 he moved to the Caterham Moto Racing Team