Jake Ellenberger (born March 28, 1985) is an American retired mixed martial artist and former United States Marine who was known for competing in the Ultimate Fighting Championship (UFC).

A professional competitor from 2005–2018, Ellenberger has also formerly competed for the Quad Cities Silverbacks of the IFL, Bodog Fight, and King of the Cage.

After starting his career with a 10–0 record, Joe was diagnosed with an extremely rare blood disease called Paroxysmal nocturnal hemoglobinuria when he was 24 years old.

[7] Ellenberger filled in on short notice for an injured Rory Markham and represented Pat Miletich's Quad City Silverbacks at the 2007 Team Championship Final.

In his last fight for the promotion, Ellenberger dominated his opponent, Pat Healy over three rounds to win a unanimous decision at IFL: Las Vegas.

[8] At the event entitled Clash of the Nations, held in St. Petersburg, Russia, Ellenberger lost a unanimous decision to UFC veteran Derrick Noble.

[14] Ellenberger stepped in on short notice for an injured Chris Lytle and lost a split decision in his promotional debut at UFC Fight Night 19 against Carlos Condit.

[16] Ellenberger was set to face Ben Saunders at UFC 111 in Newark, New Jersey as a replacement for the injured Martin Kampmann; however, once Jon Fitch's original opponent, Thiago Alves, was forced out due to a brain irregularity, Saunders requested and was granted a fight against Fitch instead.

[20] Ellenberger instead faced the then-undefeated Carlos Eduardo Rocha at UFC 126[21] and won the fight via split decision.

Ellenberger faced Sean Pierson on April 30, 2011, at UFC 129, replacing an injured Brian Foster, and won the fight via first-round KO on 17 days notice.

[30] However, Koscheck pulled out of the bout citing a back injury[31] and was replaced by returning UFC veteran Jay Hieron.

[38] MacDonald was able to use his size and reach advantage to repeatedly land his jab, neutralizing the shorter Ellenberger, resulting in a unanimous decision victory.

[41] However, in late November, Ellenberger pulled out of the bout citing a hamstring injury and was replaced by Hyun Gyu Lim.

[42] On April 9, 2014, Ellenberger revealed that he had signed an eight-fight contract with UFC with disclosed title clauses should he be a champion in the future.

[57] He lost the fight by TKO in the first round after his foot became entangled in the fence, rendering him unable to defend himself from Masvidal's strikes.

[66] On March 1, 2016, at the Hollywood Walk of Fame, Ellenberger was interviewed in the segment Lie Witness News of talk show Jimmy Kimmel Live.

He was caught lying about having voted for Donald Trump in the presidential primaries at Super Tuesday that morning, yet the election for California was not held until June 7, 2016.

However, multiple people who were previously featured on the segment claimed that the answers were taken out of context; others stated that they were playing along, knowing that it was a joke.