Jacob Joseph Volkmann (born September 5, 1980) is an American former mixed martial artist that competed in the Welterweight division.

Volkmann wrestled for the Otter Tail Central Bulldogs and holds the schools all-time record for career wins and also won three state titles.

Volkmann then attended University of Minnesota, where he was a Big Ten Conference wrestling champion and a three time NCAA All-American.

After graduating from Minnesota, Volkmann attended the Northwestern Health and Science University in Bloomington, Minnesota, where he earned his chiropractic doctorate and it was during this time that he also began competing in Greco-Roman wrestling at the senior level, and met UFC Lightweight Champion Sean Sherk through this program, who asked Volkmann to help train for a title fight.

"[3] He received a third chance in the Octagon at UFC Fight Night: Florian vs. Gomi against Ronys Torres, in which Volkmann moved down to lightweight.

[4] However, the fight was moved on August 1, to the UFC on Versus: Jones vs. Matyushenko card, due to visa issues for Kelly.

After his bout at UFC 125, Volkmann said that he wanted to fight U.S. President Barack Obama because he disagreed with his policies and asserting, "Someone needs to knock some sense into that idiot.

Volkmann was also placed on administrative leave by White Bear Lake High School, where he is the assistant head coach of wrestling.

"[15] The post-fight comments, again, got Volkmann placed on administrative leave by the White Bear Lake High School.

[18] Volkmann took Roller down early in the fight and quickly took his back, forcing him to submit to a rear-naked choke at only 2:38 of the first round.

Volkmann defeated Danny White in a 165lb Catchweight bout at Dakota FC 18: Spring Brawl on April 26, 2014.