Singh signed with the World Wrestling Federation in January 1997, with the signing announced at a press conference at SkyDome in Toronto. Singh's most notable accomplishment in the company occurred in 1997, when he won the second WWF Kuwait Cup Tournament, held on April 9, 1997 in Kuwait City. He defeated Owen Hart in the finals to become the second and final WWF Kuwait Cup winner. He would also participate and be managed by his father at the WWF's United Kingdom-exclusive pay-per-view event One Night Only on September 20, 1997, facing off against and defeating Leif Cassidy. He made his official WWF debut on the April 21, 1997 episode of Raw. He would disappear from WWF television until the Attitude Era. His gimmick was that of a rich and arrogant heir to a fortune. He came to the ring accompanied by a manservant named Babu, and would pay random people in the audience each week to perform humiliating stunts. On the Sunday night Heat before Survivor Series, Singh lost to Val Venis and at Capital Carnage he defeated Edge. at the Royal Rumble, Singh competed in the royal rumble match where he was eliminated by Mabel. On Sunday Night Heat before Singh faced Billy Gunn which ended in a no contest. on Sunday Night Heat before WrestleMania XV, Singh competed in a Battle Royal to determine #1 contenders to the WWF Tag Team Championship which was won by D'Lo Brown and Test and at No Mercy, Singh defeated Gillberg. Singh was later sent to Puerto Rico to work on his in-ring skills. He returned in late 2000 as the manager of Lo Down. Lo Down and Singh were eventually sent to International Wrestling Association in Puerto Rico, removing them from WWF programming as The Invasion of 2001 started. Down in IWA, Singh became a two-time tag team champion. He eventually suffered what he claimed was a career-ending injury and was sent home to Toronto to recover. He was later released from his contract in July 2002.
Retirement (2002–2008)
The following month, Singh filed a $7 million lawsuit against World Wrestling Entertainment. Among his claims were that his career-ending injury was the result of being forced to wrestle in the rain while in Puerto Rico. He also accused other WWE wrestlers of frequently calling him "taxi driver", and that he was the victim of a stunt in 1999 where his turban was stuffed with garbage. WWE attorney Jerry McDevitt countered by noting that the company was not responsible for any injuries occurring in a different organization, and that Singh's contract could legally be ended if he suffered an injury.
In late-2008, Hans, under the new ring name "Mick Hans", returned to wrestling as a part of the HUSTLE promotion in Japan. He made his return by teaming up with his father in a tag team match against Genichiro Tenryu and Shiro Koshinaka. On June 5, 2010, Singh won a battle royal for MPW Wrestling. On September 24, 2011, Singh and Daivari defeated Kaine and Darkko for SCW Wrestling. On July 1, 2013, at an event called TigerFest, Singh and Harry Smith defeated Big Daddy V, Rhino and Darkko in a handicap match. On July 1, 2014, at another event called TigerFest, Singh and Rhino match ended in a no contest which led to another match where Singh, Davey Boy Smith Jr. and Sonjay Dutt defeated Rhino, Soa Amin and Steve Corino in a best 2 out of 3 falls match, falls count anywhere match.