Kevin Nash aka Diesel (nicknamed "Big Daddy Cool" and "Big Sexy") debuted in World Championship Wrestling (WCW) as the orange-mohawked "Steel", one half of the tag team known as the Master Blasters. He was initially partnered with Master Blaster Iron. Nash reappeared under a new gimmick, having been repackaged as the silver-haired Oz, a character based on the Wizard of Oz. He was next repackaged as Vinnie Vegas, a wisecracking pseudo-mobster.

Nash left WCW, signing a contract with the WWF at the request of Shawn Michaels. He was given the stage name of "Big Daddy Cool Diesel", with an alpha-male gimmick. For the role, he grew long hair, taking on the appearance and demeanor of a cocky thug from Detroit, sporting black sunglasses and leather garments. The name of Diesel, suggested by Shane McMahon, was a play on the fact that Nash was from Detroit, known famously as the "Motor City". His initial entrance music was a series of truck engine and horn noises. Diesel started out as the bodyguard/best friend of Shawn Michaels, with the two being known as Two Dudes with Attitudes.

On November 26, 1994, Diesel faced Bob Backlund for the WWF Championship. In the match at Madison Square Garden, Diesel defeated Backlund in an eight-second squash. Diesel's WWF Championship reign continued until November 19, when he was defeated by Bret Hart at Survivor Series. His 358-day reign as WWF Champion is the longest of the 1990s. While in the WWF, Nash was part of The Kliq, an influential backstage group that included Shawn Michaels, Triple H, Scott Hall and Sean Waltman. Not only did he win the WWF World title, but he held the Intercontinental and Tag Team Championships (with Shawn Michaels) at various points as well (the WWF Triple Crown).

Nash left the WWF and returned to WCW in 1996, where he performed under his real name, partnering with Hall as the Outsiders and founding the New World Order (nWo) with Hulk Hogan. As the New World Order grew Nash, Hall, and Sean Waltman distinguished themselves from the rest of the nWo, calling themselves the "Wolfpac" in 1997. The nWo storyline became one of the most prominent of the Monday Night Wars, Nash maintained his status as a top star, winning the WCW World Heavyweight Championship five times and the WCW World Tag Team Championship nine times.

During his in-ring career, Nash won 20 major championships, including six world championships and twelve world tag team championships. Furthermore, he is a two-time WWE Hall of Famer, as he was inducted individually into the class of 2015 and in 2020 as an nWo member alongside Hogan, Hall and Waltman.

This skin was made for me by Yondee.