He is the 2005 world champion and former Dutch record holder with personal bests of 5.81 m outdoor and 5.75 m indoor.

At the 2005 World Championships in Athletics, he once again achieved 5.80 and won the gold medal.

Problems with his shoulder, knees and Achilles tendons resulting in an operation caused 2006 to become a "lost" year for the passionate Dutchman.

Finally, in mid-October, he cautiously resumed his training programme, and achieved better results in several indoor events at the start of 2007.

At a press conference in Sittard on 26 September 2008, Blom announced his retirement from the sport, feeling that, after various injuries and operations, his body no longer allowed him to strain it to the utmost.