[12] In 2016, Hammerstone started working in California where he appeared for Championship Wrestling from Hollywood and made his debut for PCW Ultra.

[1][13] In 2018, he started being pushed heavily in PCW Ultra, getting wins against veteran wrestlers such as Jeff Cobb, Brian Cage, Daga, Brody King, A. C. H., and Timothy Thatcher.

[11] On January 3, 2019, Hammerstone competed in a one night tournament for West Coast Pro Wrestling at their event, When the Smoke Clears, to crown the first WCPW Heavyweight Champion.

[23] He defeated Gringo Loco in the semi-final on the May 11 episode of Fusion,[24][25] and Brian Pillman Jr. in the final at Fury Road on June 1 to become the first National Openweight Champion.

[31] The feud between Dynasty and the Hart Foundation continued as Hammerstone successfully defended the National Openweight Championship against Davey Boy Smith Jr. at MLW's first pay-per-view event Saturday Night SuperFight.

[32] After a successful title defense against Douglas James on the November 23 episode of Fusion, Hammerstone participated in the inaugural Opera Cup tournament,[33] where he defeated his teammate MJF in the quarterfinal but lost to the eventual winner Davey Boy Smith Jr. in the semifinal.

[34][35] Hammerstone continued to successfully defend the National Openweight Championship against the likes of Aero Star, T-Hawk and Laredo Kid in 2020 before MLW went on hiatus due to the COVID-19 pandemic.

[50] The following month, at War Chamber, Hammerstone led The Hammerheads (EJ Nduka, Richard Holliday, Matanza Duran and Savio Vega) to defeat the Contra Unit in the titular match.

On the premiere episode of Azteca on January 6, 2022, Hammerstone and Pagano defeated Taurus and Muertes in an Apocalypto Hardcore match.

[55] Hammerstone retained the World Heavyweight Championship against Davey Richards at SuperFight and Jacob Fatu and Mads Krügger in a three-way match at Intimidation Games.

[59] On the November 24 episode of Fusion, Hammerstone defeated Holliday in a falls count anywhere match to retain the title and end the feud.

[60] Hammerstone would then retain the title against various contenders, such as Bandido,[61] EJ Nduka in a last man standing match,[62] Yamato,[63] and Jacob Fatu at SuperFight.

The lights went down in the arena, which led to Hammerstone making his return to MLW, attacking Fatu, and aligning with World Titan Federation, thus turning heel for the first time since 2020.

[71] On the February 29 episode of TNA Impact!, it was announced that Hammerstone had signed with the promotion and would face Alexander in a rematch at Sacrifice on March 8.

[72] During the bout, as the referee was on the mat recovering after being accidentally struck, Hammerstone would turn heel, hitting Alexander with a low blow, then the Nightmare Pendulum (his version of a swinging side slam), allowing him to score the victory.

[75] On August 22, 2024 episode of Impact!, Hammerstone defeated Kushida to qualify for the Ultimate X match for the TNA X Division Championship at Emergence, which was won by Zachary Wentz.