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Christopher Keith Irvine was born on November 9, 1970 in Manhasset, New York. His father, ice hockey player Ted Irvine, had relocated there to play for the New York Rangers. When his father retired, they moved back to Winnipeg, Manitoba. Irvine is of Scottish descent on his father's side.

Jericho lost the Intercontinental title to the then European Champion Kurt Angle at No Way Out. Jericho competed in a Triple Threat match against Chris Benoit and Angle at WrestleMania 2000 in a two-falls contest with both of Angle's titles at stake. Jericho won the European Championship by pinning Benoit, who in turn pinned Jericho to win the Intercontinental Championship. This was the first of six pay-per-view matches between the pair within twelve months. Jericho was originally supposed to be in the main event of WrestleMania, but was taken out after Mick Foley, who was originally asked by writers to be in the match, took his place. Jericho was even advertised on the event's posters promoting the match. Jericho lost the title the next day to Eddie Guerrero on Raw after Chyna turned heel to side with Guerrero.  On the April 17 episode of Raw, Jericho upset Triple H in a WWF Championship match. Referee Earl Hebner made a fast count when Jericho pinned Triple H, causing Jericho to win the title. Hebner later reversed the decision due to pressure from Triple H, and WWE does not recognize Jericho's reign as champion. On the May 4 episode of SmackDown!, Jericho defeated Benoit to win his third Intercontinental Championship but lost the title to Benoit four days later on Raw. Jericho's feud with Triple H ended at Fully Loaded, when they competed in a Last Man Standing match. Jericho lost the match to Triple H only by one second, despite the repeated assistance Triple H's wife, Stephanie, provided him in the match.  At the 2001 Royal Rumble, Jericho defeated Chris Benoit in a ladder match to win the Intercontinental Championship for the fourth time. At WrestleMania X-Seven, he successfully defended his title in a match against William Regal, only to lose it four days later to Triple H. At Judgment Day, Jericho and Benoit won a tag team turmoil match and earned a shot at Stone Cold Steve Austin and Triple H for their WWF Tag Team Championship on Raw the next night. Benoit and Jericho won the match, in which Triple H legitimately tore his quadriceps, spending the rest of the year injured. Benoit and Jericho each became a WWF Tag Team Champion for the first time. The team defended their title in the first fatal four-way Tables, Ladders and Chairs match, where Benoit sustained a year-long injury after missing a diving headbutt through a table. Despite Benoit being carried out on a stretcher, he returned to the match to climb the ladder and retain the championship. The two lost the title one month later to The Dudley Boyz on June 19, 2001. At King of the Ring, both Benoit and Jericho competed in a triple threat match for Austin's WWF Championship, in which Booker T interfered as the catalyst for The Invasion angle. Despite Booker T's interference, Austin retained the title.
Chris Jericho