Jacobs later moved south and began wrestling as Doomsday, also appearing as the Christmas Creature in the United States Wrestling Association (USWA) and as Unabomb in Smoky Mountain Wrestling (SMW), where he held the SMW Tag Team Championship with Al Snow in a team called The Dynamic Duo.During his time in the USWA, Jacobs (as Doomsday) held the USWA Heavyweight Championship.
The pair competed primarily as a tag team, losing a WWF Tag Team Championship match to titleholders Owen Hart and The British Bulldog at December's In Your House 12: It's Time.
As Diesel, he lost to The Undertaker via disqualification in the main event of the December 22 edition of Superstars and defeated Marc Mero on Shotgun Saturday Night on January 11, 1997.
In keeping with the notion that Kane had been scarred by the fire—and to conceal Jacobs' identity—the character wore a mask, sported long hair, and wore red and black ring attire that almost covered his entire body.
Kane and The Undertaker feuded with one another over the following year, during which time their history vis-à-vis one another was expounded.
He has continued to headline PPV cards through 2018, and has appeared in more of such events than any other performer in WWF/WWE history.