After competing for local events and King ofthe Cage, Spiritwolf was booked for the main card of the Ultimate Chaos pay-per-view. Prior to the bout, Spiritwolf accused his heavily-favored opponent Brett Cooper of looking ahead to his August 1 bout at in favor of their fight. Spiritwolf was able to get the upset and knocked out Cooper in the first round. Spiritwolf also received a notable win over UFC veteran Crafton Wallace, before signing with Strikeforce in late-2010.
King of the Cage
In December 2008, Spiritwolf signed with California based promotion King of the Cage. He made his debut for the promotion on December 11, 2008, facing Ricky Legere at KOTC: Prowler. Spiritwolf won the bout via second round TKO. In his second fight for the promotion, Spiritwolf faced Ricky Legere in a rematch at KOTC: Distorted on October 1, 2009, for the KOTC Welterweight Championship. He lost the bout via TKO. He then faced Ismael Gonzalez at KOTC: Arrival on February 25, 2010. The bout was ruled a technical draw, after Spiritwolf landed a punch to the back of the head, to which Gonzalez subsequently claimed that he couldn't see straight.
Strikeforce
Spiritwolf signed with Strikeforce to fight undefeated Billy Evangelista in a 165-Catchweight bout at Strikeforce Challengers: Bowling vs. Voelker. Spiritwolf started off the first round by knocking down Evangelista, and then landed another takedown, using the ground and pound technique. Spiritwolf landed three more takedowns in the second round, but Evangelista seemed to have a better round, landing punches and more knees from the clinch. The 34-year-old Spiritwolf seemed to be tired during the third round as Evangelista landed combinations, but continued to hold his own, demonstrating his true heart by answering back with some big punches, and then slamming the undefeated Evangelista in the final ten seconds. However, Evangelista would remain undefeated as the judges scored the contest in favor of him, making Evangelista the winner via unanimous decision. Spiritwolf said after the fight he should have won. "I come to fight and that's what I did tonight," he said. "It is bad enough I thought I deserved the decision, but to not get a round on those scorecards is ridiculous. Honestly, I feel I got ripped off." Spiritwolf fought DREAM Welterweight ChampionMarius Zaromskis at Strikeforce Challengers: Wilcox vs. Ribeiro. However, the bout was declared a no contest six seconds into the first round after Spiritwolf was accidentally poked in the eye.
Bellator
Spiritwolf made his debut for Bellator in March 2011. He faced Jaime Jara at Bellator 35 and won the back-and-forth battle via split decision. Although the bout took place on the unaired preliminary portion of the card, Bellator CEO Bjorn Rebney stated that fan interest to see the fight convinced him to air it during the following week's Bellator 36 airing on MTV2. In his second fight for the promotion, Spiritwolf faced Marius Žaromskis in a rematch. Spiritwolf weighed in a pound and a half overweight and was forced to forfeit part of his purse. Once again, the contest between the two ended in controversy as the doctor stopped the fight between rounds two and three due to a cut suffered by Spiritwolf, giving Žaromskis the TKO win. Due to the controversial nature of this stoppage, Spiritwolf and Marius Žaromskis had a rematch - the third fight between the two - at Bellator 72. He lost the fight via split decision. Spiritwolf returned to the promotion on March 21, 2013 to face former UFC veteran Marcus Davis at. Unfortunately, the bout ended in a no contest when Davis hit Spiritwolf with a knee to the groin, in the first round and he could not continue.
Independent promotions
Spiritwolf faced Morten Djursaa at EUMMA 5 on April 19, 2013. He lost the bout via KO, less than a minute within the fight. He then got his first win since his Bellator debut, when he defeated James Chaney at Shinzo Fight Sport on August 16, 2013, via second round TKO. He faced independent prospect Max Griffin at TWC 19 on January 15, 2014. He lost the fight via split decision. Spiritwolf was expected to face Angel Deanda at Tachi Palace Fights 20 on August 7, 2014. However, the bout would be cancelled for unknown reasons.