Darryl Fitton is nicknamed The Dazzler and comes to the stage dancing to the Madness song "One Step Beyond" wearing sunglasses. It is one of the most popular walk-ons with the audience. Before embarking on a career in darts, Fitton worked as an undertaker.
Fitton's first TV appearance was against Peter Manley in the 1997 PDC World Matchplay. Fitton debuted in the BDO World Championship in 2003 as a qualifier, but lost 1-3 to fellow qualifier John Burton in the first round. In 2004, he returned to Lakeside, again hitting a 180 score with his very first turn. He reached the quarter-finals before being beaten by Andy Fordham, who went on to win the title. The following year, he reached the semi-finals, this time losing out to Raymond van Barneveld in a hard-fought 5-3 scoreline, as van Barneveld went on to win the title that year. After that, Darryl did not win a match at the World Championship for the next two years, losing to Martin Adams and Phill Nixon in the first round of the 2006 and 2007 championships respectively. Fitton did reach the final of the Winmau World Masters in 2007, leading Robert Thornton 5-2 before Thornton hit back to win 7-5.
In the 2008 World Championship, Fitton got beyond the first round for the first time since 2005 when he bossed his match against Davy Richardson, running out a 3-1 winner with a 94.86 average. In the second round he put in one of the most dominant performances of the World Championship when he averaged over 100 in a 4-0 hammering of Gary Robson. His 6-0 win against Davy Richardson in the 2004 International Darts League saw him hit a three-dart average of 114.15. This was, at the time, the highest three-dart average on a televised tournament. Fitton reached the semi finals of the 2009 BDO World Championship, beating Mark Salmon in the first round and then defeated 12th seed Simon Whitlock in round two. He followed up with a 5-4 win over fourth seed Scott Waites before bowing out to his friend Tony O'Shea in a 6-4 defeat. Fitton then claimed the 2009 Dutch Open title, beating Willy van de Wiel in the final and then the Isle of Man Open title, beating World Champion Ted Hankey in the final.
In 2015, Fitton hit a nine-dart finish in the Dutch Open final against Martin Adams, although he ended up losing the match. He also reached the final of the Jersey Open losing to Scott Mitchell. In the 2016 BDO World Darts Championship, seeded seventh, Fitton was defeated 3-2 in the first round by Dennis Harbour. After that, he won the 2016 BDO World Trophy by defeating Peter Machin in the final 13-9. With this win, Fitton qualified for the 2016 Grand Slam of Darts.
Fitton was knocked out of the 2018 BDO World Darts Championship in the second round, losing to Glen Durrant 4–1. In the 2016 BDO World Darts Championship, seeded seventh, Fitton was defeated 3-2 in the first round by Dennis Harbour.
After that, he won the 2016 BDO World Trophy by defeating Peter Machin in the final 13-9. With this win, Fitton qualified for the 2016 Grand Slam of Darts.