1996 and 2000 Hungarian Olympic Team Member
Has fought primarily in Hungary and Germany
Erdei turned pro on December 5, 2000, with a TKO1 over Philip Houthoofdt, then racked up another 11 victories, with seven more knockouts, including two appearances in the United States, both underneath a Wladimir Klitschko heavyweight title defense, in Las Vegas and Atlantic City.
On October 5, 2002, Erdei won the WBO Inter-Continental Light Heavyweight title with a KO5 over Jim Murray. He then defended that title four times, three by knockout, over the next 11 months.
Erdei defeated Julio Cesar Gonzalez with a UD12 (118-110 twice, 117-111), on January 17, 2004, to win the WBO 175lb. title, defending the belt 11 times over next five years. To finish out 2004, Erdei won two decisions over the 20-0 Hugo Hernan Garay and the 24-3-1 Alejandro Lakatos.
A rematch decision victory over Garay followed in 2005 in addition to two knockout-win title defenses, all in Germany.
In 2006, Erdei successfully defended his WBO title twice with a TKO10 victory over the Pan-Asian light heavyweight champion Paul Murdoch, on May 6, and a UD12 over European champion Thomas Ulrich, on July 29. Both bouts took place in Germany.
Three title defenses ensued in 2007, with a TKO8 over Danny Santiago on January 27, a TKO11 over WBC Latino titlist George Blades, on June 16, and a decision victory over WBA Fedelatin belt-holder Tito Mendoza, on November 24.
Following two final defenses of his light heavyweight crown, both via UD12 in Germany, over DeAndrey Abron, on April 26, 2009, and Yuriy Barashian, on January 10, 2009, Erdei then moved up to the cruiserweight division. On November 21, 2009, the Hungarian won a decision over the 26-1-1 Giacobbe Fragomeni to pick up the WBC title.
After a brief retirement, Erdei returned to the light heavyweight division a year later, winning two bouts, both back in the United States, at Boardwalk Hall, in Atlantic City, NJ. On November 20, 2010, Erdei decisioned Sampson Onyango over eight rounds to shake off the rust. On June 4, 2011, Erdei stopped former champion Byron Mitchell in six rounds.