Here’s a look at the fighters who won a UFC championship in 2017, including interim champions, in order of division.
UFC featherweight: Max Holloway
Max Holloway went into Brazil and beat a legend of both the country and the sport. His third-round TKO of Jose Aldo unified the UFC featherweight title at UFC 212 in Rio de Janeiro, Brazil, on June 3, 2017.
UFC interim middleweight: Robert Whittaker
Robert Whittaker beat Yoel Romero to win the interim UFC middleweight championship at UFC 213 at T-Mobile Arena in Las Vegas on July 9, 2017.
UFC women's featherweight: Cris Cyborg Justino
Cris Cyborg Justino, considered by many as the most dangerous female fighter regardless of division, methodically broke down Tonya Evinger to claim the vacant UFC women's featherweight title at UFC 214 at Honda Center on July 29, 2017.
UFC light heavyweight: Jon Jones
Thought of as one of if not the best MMA fighter ever, Jon Jones reclimbed the mountain after more than two years of drama, legal issues and suspensions. He won back his UFC light heavyweight title by finishing Daniel Cormier in the third round with a vicious head kick and ground and pound at UFC 214 on July 29, 2017, at the Honda Center in Anaheim, Calif.
UFC light heavyweight: Daniel Cormier
Daniel Cormier was reinstated as the UFC light heavyweight champion on Sept. 13, one day after Jon Jones' B sample also tested positive for the steroid Turinabol. Jones had beaten Cormier by third-round knockout to reclaim the light heavyweight championship, a title he has had taken away three times because of various infractions.
UFC interim lightweight: Tony Ferguson
Tony Ferguson submitted Kevin Lee in the third round at UFC 216 on Oct. 7, 2017, to win the interim lightweight title.
UFC women's strawweight: Rose Namajunas
Rose Namajunas gets emotional as Dana White presents her the strawweight title after her upset first-round knockout of Joanna Jedrzejczyk at UFC 217 at Madison Square Garden on Nov. 4, 2017.
UFC bantamweight: TJ Dillashaw
TJ Dillashaw, right, celebrates as referee Dan Miragliotta raises his hand in victory after his bantamweight championship bout against Cody Garbrandt at UFC 217 at Madison Square Garden on Nov. 4, 2017. Dillashaw won back his title with a second-round TKO.
UFC middleweight: Georges St-Pierre
Georges St-Pierre submitted Michael Bisping in the middleweight title fight at UFC 217 at Madison Square Garden on Nov. 4, 2017. St-Pierre returned after a four-year absence to become the fourth fighter in history to win titles in multiple UFC weight classes.
UFC middleweight: Robert Whittaker
Whittaker was named the undisputed UFC middleweight champion in early December after Georges St-Pierre vacated the title to deal with a health issue 33 days after he won it from reigning champion Michael Bisping.
UFC women's flyweight: Nicco Montano
Montano beat Roxanne Modafferi by unanimous decision at The Ultimate Fighter 26 Finale in Las Vegas on Dec. 1, 2017, to become the promotion's inaugural women's flyweight champion.