1. Demetrious Johnson
   Brian Ortega
2. Nate Diaz
   Daniel Cormier

Daniel Cormier made two U.S. Olympic teams for wrestling in 2004 and 2008 before switching to MMA. He became the rare UFC fighter to hold championship titles in both light heavyweight and heavyweight divisions at the same time, and by August 2018, Cormier was ranked as the number one pound-for-pound fighter in the UFC.

1. Jon Jones
   Conor McGregor
2. Stipe Miocic
   Anderson Silva

Irish fighter Conor McGregor is one of the most recognizable UFC fighters ever, both due to his skill in the ring and his antics out of the ring. He won featherweight and lightweight titles in 2015, and was ranked as the number two pound-for-pound fighter in the UFC in the summer of 2018.

1. Brian Ortega
   Chuck Liddell
2. Max Holloway
   Georges St. Pierre

Featherweight fighter Max Holloway made his UFC debut in 2012 -- the youngest UFC fighter on the roster at that time. Though he lost that first match, he went on to be ranked as the fourth best pound-for-pound fighter in the UFC by August 2018.

1. Nate Diaz
   TJ Dillashaw
2. Robert Whittaker
   George St. Pierres

Canadian Georges St. Pierre has been one of the most successful welterweight fighters in UFC history. Though he vacated his middleweight title due to illness in 2017, he remained high in UFC pound-for-pound rankings in 2018.

1. Royce Gracie
   Daniel Cormier
2. Demetrious Johnson
   Jon Jones

Demetrious Johnson was a successful MMA and cagefighter before moving to the UFC in 2011. He won his debut match in a unanimous decision, and became the inaugural champ in the UFC flyweight division.

1. Chuck Liddell
   Tyron Woodley
2. Conor McGregor
   Anderson Silva

Tyron Woodley was a Division I wrestler in college before moving to a career in MMA. He won the UFC welterweight championship at a July 2016 match in Atlanta, Georgia.

1. Stipe Miocic
   Randy Couture
2. Brian Ortega
   Max Holloway

Stipe Miocic picked up the heavyweight championship title at UFC 198 in 2016. By July 2018, he was ranked number one in the UFC heavyweight rankings, and number eight on the organization's list of top pound-for-pound fighters.

1. Amanda Nunes
   Holly Holm
2. Rhonda Rousey
   Nicco Montano

Amanda Nunes became the UFC bantamweight champion at UFC 200 in 2016 -- a title she went on to defend at least three times through summer 2018. In July 2018, she was listed as the 14th best pound-for-pound fighter within the UFC -- a list that includes both men and women.

1. Demetrious Johnson
   Max Holloway
2. Daniel Cormier
   Jon Jones

Jon Jones earned the light heavyweight championship title in 2011, and again in 2016. Despite a lot of success in the ring, his career has been threatened by both legal troubles and struggles with banned substances.

1. Cris Cyborg
   Nicco Montano
2. Rhonda Rousey
   Rose Namajunas

Nicco Montano joined the UFC in 2017, and went on to become the inaugural flyweight champ. She defeated Roxanne Modafferi in a December 2017 match in Las Vegas to take the belt.

1. Conor McGregor
   TJ Dillashaw
2. Stipe Miocic
   Jon Jones

TJ Dillashaw wrestld for Cal State Fullerton before building a career in MMA. He was the UFC bantamweight champ in 2014, and again in 2017. By July 2018, he was ranked as the third best pound-for-pound fighter in the UFC.

1. Demetrious Johnson
   Chuck Liddell
2. Khabib Nurmegomedov
   Max Holloway

Russian fighter Khabib Nurmegomedov earned a black belt in judo before moving into MMA. He won the UFC lightweight title at UFC 223 in April 2018, making him the first Muslim fighter in UFC history to win a title.

1. Robert Whittaker
   Nate Diaz
2. Brian Ortega
   Jon Jones

Aussie Robert Whittaker took down Yoel Romero at UFC 213 to become middleweight champion in July 2017. A year later, he was ranked at number 10 on the UFC's pound-for-pound rankings.

1. Amanda Nunes
   Holly Holm
2. Cris Cyborg
   Rhonda Rousey

Cris Cyborg took the UFC women's featherweight title at UFC 214 in 2017. She defeated Holly Holm in December of that year , then held off Yana Kunitskaya to defend the title yet again in March 2018.

1. Henry Cejudo
   Daniel Cormier
2. Conor McGregor
   Max Holloway

Henry Cejudo won a gold medal in wrestling at the 2008 Olympics in Beijing before turning his focus to MMA. He defeated Demetrious Johnson at UFC 227 in 2018 to become the UFC flyweight champ.

1. Demetrious Johnson
   Tony Ferguson
2. Stipe Miocic
   Georges St. Pierre

Tony Ferguson defeated Kain Lee to become UFC lightweight champ in 2017. By July 2018, he was ranked 13th on the UFC list of best pound-for-pound fighters.

1. TJ Dillashaw
   Chuck Liddell
2. Anderson Silva
   Jon Jones

Anderson Silva made his UFC debut in 2006 at Ultimate Fight Night 55, where he beat Chris Leben by knockout. He earned the UFC middleweight championship title in 2006 at UFC 64.

1. Holly Holm
   Rose Namajunas
2. Cris Cyborg
   Amanda Nunes

Rose Namajunas signed with UFC in 2013. In 2017, she beat Joanna Jedrzejczyk at UFC 217 for the women's strawweight championship title.

1. Max Holloway
   Daniel Cormier
2. Demetrious Johnson
   Matt Hughes

Matt Hughes was an NCAA Division I wrestler, a boxer and an MMA fighter before joining the UFC. The two-time welterweight champ retired in 2013, and was inducted into the Hall of Fame in 2010.

1. Holly Holm
   Rhonda Rousey
2. Rose Namajunas
   Nicco Montano

Holly Holm was a kickboxer and pro boxer before making her UFC debut in 2015. She shot to fame when she defeated the favorite Rhonda Rousey at UFC 193 in November 2015.

1. Nate Diaz
   Chuck Liddell
2. Conor McGregor
   Jon Jones

Chuck Liddell fought in more than 20 UFC matches before retiring in 2010. He was inducted into the UFC Hall of Fame in 2009, and has since participated in "Dancing with the Stars" and "Celebrity Big Brother."

1. Anderson Silva
   Brian Ortega
2. Randy Couture
   Conor McGregor

Randy Couture was a successful college wrestler, and an Olympic team alternate, before moving to the UFC. Throughout his career, he fought in 16 title matches, winning the heavyweight championship three times and the light heavyweight championship twice.

1. Daniel Cormier
   Demetrious Johnson
2. Stipe Miocic
   Jose Aldo

Jose Aldo of Brazil went undefeated in the UFC from November 2015 to December 2015. He won the inaugural featherweight title in 2010, and earned the championship again in 2016.

1. Vitor Belfort
   Conor McGregor
2. Jon Jones
   Max Holloway

Vitor Belfort has competed in light heavyweight, middleweight and heavyweight bouts throughout his career. the former pro boxer became light heavyweight champ at UFC 46 in 2004, and also won the UFC 12 heavyweight tournament.

1. Henry Cejudo
   Anderson Silva
2. Matt Hughes
   Frank Shamrock

Nicknamed The Viking because of his Swedish heritage, Frank Shamrock started boxing as a child, and switched to MMA in 2006. His 2013 bout against Jon Jones earned him an award for UFC Fight of the Year.

1. Georges St. Pierre
   Anderson Silva
2. Sergio Pettis
   Conor McGregor

Sergio Pettis won the North American Bantamweight Championship in 2013, which helped him get signed by the UFC soon after. He competed in the flyweight division, winning a Fight of the Night Award against Alex Caceres in 2014.

1. Demetrious Johnson
   Jon Jones
2. Frank Shamrock
   Alexander Gustafsson

Alexander Gustafsson had an extensive boxing, wrestling and MMA background before moving to the UFC. He won the inaugural UFC middleweight championship by defeating Kevin Jackson at UFC Japan in 1997.

1. Donald Cerrone
   Tony Ferguson
2. Daniel Cormier
   Max Holloway

Nicknamed Cowboy, Donald Cerrone was a world extreme cagefighting and kickboxing champ before moving to UFC in 2010. He was named Breakthrough Fighter of the Year at the 2011 World MMA Awards.

1. Mark Hunt
   Brian Ortega
2. Georges St. Pierre
   Conor McGregor

Samoan kickboxer and martial artist Mark Hunt made his MMA debut in 2010. At the 2014 World MMA Awards, he picked up the Knockout of the Year for his fight against Roy Nelson.

1. Demetrious Johnson
   Frankie Edgar
2. Stipe Miocic
   Jon Jones

Frankie Edgar won the UFC lightweight championship title in 2010 at UFC 112 by defeating B.J. Penn. By 2012, he had switched classes to the featherweight division.

1. Frank Shamrock
   Randy Couture
2. BJ Penn
   Max Holloway

B.J. Penn was a world champion gold medalist in jiu jitsu before switching to MMA. He won the UFC championship title in both light and welterweight divisions, and was inducted into the UFC Hall of Fame in 2015.

1. Demetrious Johnson
   Conor McGregor
2. Royce Gracie
   Georges St. Pierre

Royce Gracie won UFC 1, 2, and 4 between 1993 and 1994. He was the first fighter inducted into the Hall of Fame in November 2003.

1. Chuck Liddell
   Jon Jones
2. Nate Diaz
   Dan Henderson

Dan Henderson was a Division I college wrestler, and also competed in both the 1992 and 1996 Olympics. He made his debut at UFC 17 in 1998, where he won the middleweight tournament.

1. Daniel Cormier
   Frank Shamrock
2. Demetrious Johnson
   Dominick Cruz

Dominick Cruz was the final World Extreme Cagefighting champ, and then became the first UFC bantamweight champ. He made an unexpected comeback to the sport in 2016, winning back his bantamweight title.

1. Cory Garbrandt
   Conor McGregor
2. Tyron Woodley
   Donald Cerrone

Cory Garbrandt won the bantamweight title in 2016 at UFC 207 by defeating Dominick Cruz. He had his first pro MMA loss as UFC 2017.

1. Chuck Liddell
   Brian Ortega
2. Stipe Miocic
   Jon Jones

Brian Ortega was a successful boxer before signing with the UFC in 2014. He won the Breakthrough Fighter of the Year at the 2017 World MMA Awards.

1. Derrick Lewis
   Conor McGregor
2. Max Holloway
   Georges St. Pierre

Derrick Lewis made his UFC debut in 2014, defeating Jack May by TKO. Despite losing to Mark Hunt at UFC 110 in 2017, his performance was impressive enough to earn him Fight of the Night.

1. Robbie Lawler
   Demetrious Johnson
2. Frank Shamrock
   Dan Henderson

Robbie Lawler was an all-state football player and wrestler. He made his debut at UFC 37 in 2002, then won the welterweight title at UFC 181 in 2014.

1. Darren Till
   Sergio Pettis
2. Jon Jones
   Conor McGregor

Nicknamed The Gorilla, Darren Till made his UFC debut in 2015. He fought to a draw in a bout with Nicolas Darby at UFC Fight Night in October 2015, but still got a nod for Fight of the Night.

1. Nate Diaz
   Daniel Cormier
2. Max Holloway
   Chuck Liddell

Nate Diaz won Ultimate Fighter 5 in 2007. An epic match with Michael Johnson at UFC Fox 17 in 2015 earned Diaz Fight of the Night.