Pound-for-pound rankings: Kamaru Usman's takeover is No. 1 among many changes

Usman makes Jon Jones' stay at the top a brief one, and Rose Namajunas makes her move in the ESPN rankings.

source https://www.espn.com/mma/story/_/page/p4pMarch30/mma-pound-pound-rankings-kamaru-usman-takeover-no-1-many-changes