Following the expiration of his contract with WCW's parent company, AOL Time Warner, in March 2002, Borden held talks with the WWF, but ultimately did not join the promotion and instead toured internationally with World Wrestling All-Stars (WWA) – winning the WWA World Heavyweight Championship – before joining the then-upstart TNA in 2003. Over the following 11 years, he won the NWA World Heavyweight Championship on one further occasion and the TNA World Heavyweight Championshipfour times, as well as being the inaugural inductee into the TNA Hall of Fame in 2012. He is the only man to hold the NWA, WCW (WWA and WCW International, additionally) and TNA world championships in a career.[not in citation given] Previously described by WWE as the greatest wrestler never to have performed for that promotion, Sting finally joined the company in 2014, making his first appearance at Survivor Series and having his debut match at WrestleMania 31 the following year. His last ever bout at Night of Champions in September 2015, marked his sole WWE pay-per-view main event and WWE World Heavyweight Championship contest for the organization. Sting headlined the WWE Hall of Fame class of 2016 on April 2, where he announced his retirement. His induction renders him the first performer to be inducted into both the WWE and TNA Hall of Fame, as well as the second man to be inducted while an active WWE wrestler, after Ric Flair.