Voelker is from Kansas City, Missouri, and attended Shawnee Mission South High School where he competed in football as well as swimming and diving. Voelker also got into many street fights, being charged with battery when he was 18 years old, and began training in boxing and kickboxing late in high school. After graduating high school, Voelker briefly attended college before dropping out and eventually transitioned into a career in professional mixed martial arts.
Voelker compiled an undefeated amateur record of 10-0 before making his professional MMA debut in 2006. He competed in events primarily in Iowa and Kansas, amassing a record of 20-7 before signing with Strikeforce.
Strikeforce
Voelker's debut took place on November 20, 2009 at, where he faced off against WEC veteran Erik Apple, defeating Apple via TKO in the second round. His second appearance took place at Strikeforce Challengers: Lindland vs. Casey, where he faced heavy-handed up-and-coming striker "Relentless" Roger Bowling. The fight ended in a technical decision in favor of Bowling due to an unintentional eye injury to Bowling. He was next signed to face Cory Devela, who was on a two-fight slide, on July 23, 2010, at Strikeforce Challengers: del Rosario vs. Mahe. Devela easily took round one, swarming Voelker and turning the fight into a grappling match. The second and third rounds were a lot closer to call, with Devela mostly controlling Voelker in the clinch, but the split decision was awarded to Voelker, who remained in a dominant position for much of the final frames, landing shots from top position. A rematch with Bowling took place at Strikeforce Challengers: Bowling vs. Voelker. Voelker won a very one-sided fight via technical knockout in the second round due to punches. Voelker and Bowling fought for a third time at Strikeforce Challengers: Voelker vs. Bowling III to create Strikeforce's first trilogy. Once again, Voelker dominated and out struck Bowling, thus winning the fight via TKO due to a knee in the second round.
In January 2013, the Strikeforce organization was closed by its parent companyZuffa. A list of fighters scheduled to be brought over to the Ultimate Fighting Championship was released in mid-January and Voelker was included. For his debut, Voelker faced Patrick Côté, who was making his Welterweight debut, on March 16, 2013 at UFC 158. Despite finishing strong and winning the third round, Voelker was unsuccessful in his debut, losing the back-and-forth fight via unanimous decision. Voelker was briefly scheduled to face James Head on August 28, 2013 at UFC Fight Night 27. However, on July 11, it was announced that Voelker was tabbed as a replacement for Siyar Bahadurzada and face Robbie Lawler on July 27, 2013 at UFC on Fox 8. He lost the fight via knockout in the second round. Voelker faced William Macário on December 28, 2013 at UFC 168. He lost the fight via unanimous decision. Voelker faced Lance Benoist on June 7, 2014 at UFC Fight Night 42. He lost the back-and-forth fight via unanimous decision, and was subsequently released from the promotion.
Bellator
After racking a 7-1 record in the regional circuit, Voelker signed a contract with Bellator in April 2019.
Personal life
Aside from his career as a fighter, Voelker works in construction and is also a devout Catholic. He is currently finishing his college education at Kansas City Community College, and is studying to be a paramedic.
