Robbie Rage

After leaving WCW, Knapik, under the ring name Rob Rage, returned to NJPW in 2000 and found success in the mid-card as singles wrestler until leaving the promotion on July 20, 2002. Knapnik went on a hiatus soon afterwards before returning to wrestling by joining the World Wrestling Council on August 28, 2005. He remained with the WWC until September 14, 2007, when he wrestled his final match during the promotion's Septiembre Negro Tour.

In 1997, Rage and Kaos travelled to Japan to perform for New Japan Pro Wrestling. Upon arriving, they began feuding with nWo Japan, the Japanese version of the New World Order (nWo) before representing WCW in the Super Grade Tag League. Upon their return to the United States, Knapik joined Tim Catalfo's Obake Gym and befriended Yuji Nagata, who was also wrestling in WCW. After suffering a rotator cuff tear, Knapik was sidelined from wrestling for seven months. During this time, High Voltage disbanded as Kaos began competing as a singles wrestler before being nominated by Rick Steiner to become his new tag team partner, resulting in Kaos becoming one half of the World Tag Team Champions. On the December 17, 1998 episode of Thunder, Rage, while sporting a brace to nurse his arm injury, returned to confront Kaos over the matter of allying with Steiner rather than himself to claim the title. On the December 21 episode of Nitro, Rage distracted Kaos in order to allow Lex Luger to defeat him via submission before once again confronting Kaos over High Voltage's split. However, before the angle could develop any further, Knapik was released from his contract during his recovery.

Knapik attended a wrestling show in Florida in 1995 at the suggestion of a friend, and after calling various promoters and wrestling promotions, he was signed to a contract with World Championship Wrestling later on in the year. Along with Kenny Stasiowski, Knapik began training in WCW's Power Plant wrestling school. Upon completion of their training, Knapik and Stasiowski debuted on WCW television under the ring names Robbie Rage and Kenny Kaos, respectively, and they formed the tag team High Voltage. High Voltage regularly appeared against mid-card opponents on the WCW television shows Saturday Night and WorldWide during the late 1990s, while also appearing as jobbers on Nitro.

Robert J. Knapik (born 1970) is an American former professional wrestler. He is best known for his tenure with World Championship Wrestling under the ring name Robbie Rage and as a part of the tag team High Voltage with Kenny Kaos.