The bracketed number to the right of the fighter indicates the fighters prior ranking. These rankings are unofficial as North Star Sports is not affiliated with, sponsored, or endorsed by the UFC.

Lightweight (May 20)Lightweight (December 19)Change
CKhabib NurmagomedovCKhabib NurmagomedovEVEN
ICJustin Gaethje1Justin GaethjeEVEN
2Tony Ferguson2Dustin Poirier+1
3Dustin Poirier3Charles Oliveira+3
4Conor McGregor4Tony Ferguson-2
5Dan Hooker5Conor McGregor-1
6Charles Oliveira6Dan Hooker-1
7Paul Felder7Rafael dos Anjos+9
8Al Iaquinta8Paul Felder-1
9Kevin Lee9Al Iaquinta-1
10Carlos Diego Ferreira10Kevin Lee-1
11Gregor Gillespie11Carlos Diego Ferreira-1
12Islam Makhachev12Gregor Gillespie-1
13Drew Dober13Islam Makhachev-1
14Donald Cerrone14Beneil Dariush+1
15Beneil Dariush15Drew Dober-2
   Donald Cerrone-2