Bill Danenhauer attended Westside High School in Omaha, Nebraska where wrestled
and played football for the Warriors. He attended the University of Nebraska Omaha,
where he played football for the Omaha Mavericks. Danenhauer went on to play in the
United States Football League (USFL) before ending his playing career.
In 1989, Danehauer decided to become a wrestler after meeting Harley Race at a high
school tournament. He trained under Len Denton and debuted later that year.
Danenhauer started wrestling in the National Wrestling Alliance territory Pacific Northwest
Wrestling under the ring name "The Equalizer".
He teamed with The Grappler as "The Wrecking Crew", with the duo winning the NWA
Pacific Northwest Tag Team Championship on two occasions.
In 1990, he would tour on and off with Catch Wrestling Association for two years under the name "The Barbarian".
In 1991, he briefly wrestled in New Japan Pro-Wrestling, most notably losing a match to Scott Norton on March 21 at the Tokyo Dome.
In 1992, Danenhauer left PNW for the Global Wrestling Federation where he wrestled as "Captain Ron". Worked in Puerto Rico for the World Wrestling Council.
He would tour the United Kingdom under the name "American Hawkwind."
In 1993, Danenhauer joined World Championship Wrestling as The Equalizer, and teamed briefly with Rick Rude as his tag team partner/bodyguard. They feuded with Dustin Rhodes and Road Warrior Hawk. He also teamed with Paul Orndorff.
His biggest push started in the summer of 1994 when he became "Dave Sullivan" the dyslexic brother of Kevin Sullivan who regularly mispronounced his name as "Evad". He was being picked on by The Nasty Boys and brought Kevin in to help him against them. He suffered an injury and had to be pulled from the storyline.
Hulk Hogan made his WCW debut that summer, and Sullivan became his biggest fan. Kevin hated Hogan, and problems started brewing.
Sullivan started teaming with Hogan and Sting against Ric Flair and his henchmen, and Kevin soon turned on Dave, which started a feud that went into 1995.
After his feud with Kevin ended, Dave fell in love with Kimberly, the valet of Diamond Dallas Page. Page took offense to this and started a feud with Dave that lasted all summer. During this feud, Dave gave Kimberly presents, which infuriated Page even more, and at point won an arm wrestling contest at the 1995 Great American Bash which resulted in him going on a date with Kimberly. Sullivan eventually lost the feud and moved on.
Sullivan's next feud was with Big Bubba Rogers. Sullivan had a pet rabbit that he brought to ringside with him, and Bubba was allergic to rabbits. Bubba started wearing a surgical mask to keep from inhaling the allergens, but Sullivan would always pull it off and get the victory.
Danenhauer left WCW in early 1996 after participating in the second World War 3 event.
From 1996 to 2001 he worked with Oklahoma Pro which ran in Arkansas and Oklahoma as Dave Sullivan and some shots in Puerto Rice as Equalizer with Carlos Colan. He reigned for a brief time as the Oklahoma Pro Champ in 1998.
Bill Danenhauer retired from professional wrestling in 2001. He began working as offensive coordinator for the Vikings football team of Dana College in Blair, Nebraska. He was appointed head football coach in 2003 and later athletic director.