On July 16, 2010, Williams made his debut for Collective League Of Adrenaline Strength And Honor (CLASH) in the first round of the NPCI 2010 Tag Team Tournament where he teamed up with Zach Gowen to lose to Gavin Quinn and Tommy Treznik. Williams made his return on February 26, 2011 when he took on Gavin Quinn for the CLASH Championship and lost. He received another shot at the title in August and once again lost. On January 21, 2012, Williams defeated Quinn in a three-way match for the CLASH Championship which also included J. Miller. Since then on in, Williams has been on a singles winning streaks which included multiple championship defences against the likes of Alex Shelley. He lost the title to J. Miller on January 17, 2013. On June 22, 2013 at House of Hardcore 2 Williams defeated Alex Reynolds and Tony Nese in a three-way match but lost in a rematch on November 9, 2013 at House of Hardcore 3. On May 9, 2014 at Border City Wrestling's East Meets West event Williams teamed with Brent B in a losing effort over Time Splitters (Alex Shelley & Kushida) in Match 2 of BCW vs. NJPW Series. Later in May 2014, Petey was defeated by JP Simms in a match for the IFWA Heavyweight Championship at a WrestleCentre Voltage taping, following a Simmulator. On June 6 at House of Hardcore 4 Williams defeated Tony Nese and Alex Reynolds in a Three-way match. On June 7 at House of Hardcore 5 Williams teamed with Tony Nese in a losing effort over Bad Influence (Christopher Daniels & Frankie Kazarian).