William Jason Reso (born November 30, 1973)^[2] is a Canadian professional wrestler and actor, better known by his ring names Christian and Christian Cage. He currently wrestles for the World Wrestling Entertainment (WWE) promotion, formerly the World Wrestling Federation (WWF), on its SmackDown brand.

Reso was trained by former professional wrestlers Ron Hutchinson, Dory Funk, Jr., and Tom Prichard, and made his wrestling debut in June 1995. Reso wrestled in Canadian independent promotions early in his career. During his time in these promotions, he won various championships in tag team competition. Reso signed with the WWF in August 1998, after training in the company's wrestling training camp, The Funking Conservatory.

After signing with the WWF, Reso made his debut and captured his first title with the company, the WWF Light Heavyweight Championship, and would hold onto it for a month. Also in 1998 he was given a vampire character, in which he formed an alliance with Gangrel and Edge, forming The Brood. The following year, Reso and Edge parted ways with Gangrel and formed an alliance of their own. The two would go on to win the WWF Tag Team Championship on seven occasions. The tag team, however, ended in 2001. Reso later worked as a sole performer, which led to him winning the WWF European and the WWF Intercontinental Championships, on separate occasions.

Following his departure from WWE, he signed with the Total Nonstop Action Wrestling (TNA) promotion in November 2005, where he competed under the ring name Christian Cage. In February 2006 he won his first of four professional wrestling world heavyweight championships – the NWA World Heavyweight Championship – but would go on to lose it four months later. He recaptured the title in January 2007, which led to him starting his own alliance known as Christian's Coalition, but was later stripped of the title in May 2007. Christian's Coalition later disbanded in early 2008. Reso left TNA in January 2009 and re-signed with WWE, where he debuted on the ECW roster. In April 2009, Reso won his first world heavyweight championship in WWE: the ECW Championship, which he would win again in July 2009. Reso holds the record for the longest reigning ECW Champion in the WWE era.

In addition to being a four-time world heavyweight champion, Reso has won the World Tag Team Championship nine times, WWF/E Intercontinental Championship three times, the WWF European Championship one time, WWF Hardcore Championship one time, and the WWF Light Heavyweight Championship one time.