Aside from competing primarily in ROH, Danielson has also competed in a multitude of other independent promotions, both in the United States and abroad. In 2003, Danielson also toured the United Kingdom for British promotion, All Star Wrestling (ASW). While he was in the United Kingdom, Danielson won the World Heavy Middleweight Championship on May 6 in an eight-man one-night tournament in Croydon defeating James Mason. He spent the next six months in the United Kingdom, working for ASW, Frontier Wrestling Alliance (FWA), the World Association of Wrestling (WAW) and Premier Promotions. He returned several times over the next five years, working for various promotions. In February 2005 at New Dawn Rising, Danielson made his debut in ROH's sister promotion, Full Impact Pro (FIP), teaming up with Rocky Romero in a match against Austin Aries and Homicide. The next night at Dangerous Intentions, Danielson competed in a losing effort against CM Punk, which led to a brief feud between the two. Danielson's biggest success came in 2006 by winning the FIP Heavyweight Championship, holding the belt for eleven months before losing it to Roderick Strong. Danielson wrestled his last match for FIP in December 2006 at Florida Rumble, where he lost to Erick Stevens.