During the Monday Night Wars of the 90s, The Undertaker emerged as one of the top stars. The fierce competition between WWE and WCW caused many wrestlers to switch between the two promotions.
Undertaker on whether he considered going to WCW: WWE After the Bell, June 18, 2020
The Undertaker began his wrestling career in 1987, spending two years in WCW. Despite his potential, WCW never gave him the chance to become an established star. In 1990, he decided to join WWE, making his debut at that year's Survivor Series, where he introduced his iconic character.
In the latter part of the decade, WWE faced stiff competition from Ted Turner-owned WCW. WWE's Monday Night Raw went head-to-head with WCW's Monday Nitro in a fierce ratings battle for many years, with WCW outperforming WWE in the ratings for 83 consecutive weeks.
During these wars, many stars, such as Lex Luger, Hulk Hogan, Scott Hall, Kevin Nash, Chris Jericho, Eddie Guerrero, Bret Hart and Big Show, switched promotions. However, The Undertaker remained loyal to WWE throughout.