Chris Cariaso, who worked his way up to challenge for the UFC flyweight title in 2014, has announced his retirement after 25 pro bouts.

Cariaso (17-8) has lost his last three, falling to Demetrious Johnson via submission for the belt and both Henry Cejudo and Sergio Pettis via decision last year.

“I’ve decided after 22 years of active fighting to call it a career. It’s a bittersweet decision, as fighting and competing in a ring or cage is about all that I have known for a lifetime,” Cariaso told “The last four-and-a-half years fighting under the umbrella of Zuffa have been nothing short of amazing. I have so many memories and have been able to travel the world doing what I love best.

“Honestly, my life is what many only get to dream about and I have to thank so many people for making dreams a reality for me.”

Starting in 2006, Cariaso has fought in Strikeforce, the WEC and the UFC. He debuted in the WEC in 2010, scoring a decision over Rafael Rebello. Later that year, he lost via submission to future UFC bantamweight champion Renan Barao.

Cariaso, who owns a pair of gyms and plans to spend more time with his family, has also fought the likes of Michael McDonald, John Moraga and Jussier Formiga. He went 7-6 over 13 appearances inside the Octagon.