Answer by taking a quote from the following article:

Nash was born on July 9, 1959, to a devout Christian family, in southwest Detroit, Michigan. Nash's father, Robert, died of a heart attack on April 4, 1968, aged 36, when Nash was eight years old. On December 27, 1994, Nash's mother, Wanda, died after a four-year struggle against breast cancer. He attended Aquinas High School, followed by the University of Tennessee, where he majored in psychology and minored in educational philosophy.

Nash 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 Master Blaster Iron, with whom he made his debut at the Clash of the Champions on September 5, 1990, defeating Brad Armstrong and Tim Horner. At the following Worldwide taping on September 7, the Masters Blasters began a feud with Tim Horner and Mike Rotundo. They would defeat Horner and Rotundo on several house shows. On September 22, Nash's partner Master Blaster Iron was replaced by "Blade".  The reconstituted Master Blasters continued their undefeated streak in October. Meanwhile, Nash would have his first singles match on September 28 by defeating Tom Zenk. At Halloween Havoc on October 27, 1990, the Blasters upended The Southern Boys and began to move up the WCW tag team ratings. However, their winning streak would finally come to an end on November 22, when Tom Zenk and Brian Pillman handed them their first defeat with Pillman pinning Blade. They rebounded to go on another undefeated streak by defeating The Southern Boys as well as Alan Iron Eagle and Tim Horner, and earning a NWA United States Tag Team Championship title shot against then champions The Steiner Brothers, but were defeated in two occasions. They were squashed on television in 52 seconds by the Steiners in a match that aired on Worldwide on February 2, 1991. Following this loss, their momentum began to dissipate as the Blasters would suffer follow-up losses to The Southern Boys and Ricky Morton and Tommy Rich. The tag team disbanded at the end of the month.  Nash was then rebranded as simply The Master Blaster in February 1991 and suffered his first singles defeat on February 27, 1991 when he was pinned by The Junkyard Dog. He also lost to Brian Pillman in house show matches, while appearing in tag team matches with Stan Hansen and Arn Anderson. His final match in this guise was against Pillman at a house show on May 12.

How long did they remain undefeated?
However, their winning streak would finally come to an end on November 22,