After returning to the states and completing his studies, he enrolled in the Chikara Wrestle Factory in Allentown, Pennsylvania, in September 2003, under head trainer Mike Quackenbush and co-instructors Chris Hero and Skayde.

On July 31, 2006, Sweeney made an appearance on Raw, broadcast live from the Meadowlands Arena in New Jersey, where he played an imposter Nick Hogan in a segment titled "Orton Knows Best".

On May 11, 2007, in McKeesport, Pennsylvania, he won the IWC Super Indy Title after defeating "Black Machismo" Jay Lethal, Azrieal, and Shiima Xion in a one-night tournament.

On July 20, 2007, Sweeney was crowned the first CWE Undisputed Champion after defeating Eddie Kingston and Chris Hero in separate matches in Youngstown, Ohio.

Sweeney made his debut with the Hawaii-based promotion Action Zone Wrestling on January 7, 2008, CIMA at their event Battleclash III, a match billed on his 'ain't no doubt about it' DVD as the 66th Pearl Harbor anniversary showdown.

After being trained at the Chikara Wrestle Factory, Sweeney made his debut for the promotion on July 10, 2004, at the second annual Young Lions Cup, as the leader of Sweet 'n' Sour International, a stable of wrestlers who had been denied wildcard spots in the tournament.

[11] Sweeney entered the 2005 Tag World Grand Prix with Share Cropper, but they were eliminated from the tournament in the first round by Shane Storm and Mister ZERO.

[12] On May 20 Sweeney and Cropper were defeated by Jolly Roger and Lance Steel in a "Crybaby/Slave for a Month" match and as a result the entire Sweet 'n' Sour International were forced to wear diapers the following night.

[8] Sweeney recaptured the Texarkana title in Canada,[8] but on November 18, 2006, at Talent Borrows, Genius Steals Kingston defeated him in a "Yellow Belly Strap match" to win the feud.

[8] Chikara Director of Fun Leonard F. Chikarason came out and announced that since Shayne Hawke was unable to make it to the show, the Fabulous Three were taken out of the 2009 King of Trios.

[8] On December 23, 2006, Sweeney made his debut in Ring of Honor (ROH), interfering on behalf of the Kings of Wrestling (Chris Hero and Claudio Castagnoli) in their win against the Briscoe Brothers.

Matt Sydal was briefly a part of Sweet & Sour Inc. during the summer of 2007, but left when Sweeney signed him to a developmental contract with World Wrestling Entertainment.

On May 10, 2008, Brent Albright quit the group following a loss where he and Chris Hero lost a scramble match to Delirious and Pelle Primeau (also included were Jack Evans and Ruckus).

[26][27] On July 26, 2010, Sweeney returned to Chikara at Chikarasaurus Rex: King of Show, where he, disguised as Vökoder, a cyborg, previously portrayed by Tim Donst, stared down his Bruderschaft des Kreuzes partner Pinkie Sanchez.

[30] On October 19 it was announced that Vökoder would take the final open spot on UltraMantis Black's Team Chikara in the torneo cibernetico match, where they would face BDK.

Many of Sweeney's fellow wrestlers also wrestled with a pink and purple armband, while Mike Quackenbush and Jigsaw used his signature moves to win their match.

[36] Whybrow was found dead on the morning of April 11, 2011, at the age of 30, after he died by suicide by hanging himself from a turnbuckle post at a Lake Charles, Louisiana wrestling school.