The final USA TODAY Sports/MMA Junkie rankings update of 2021 is in, and though he didn’t fight this year, former UFC light heavyweight champion Jon Jones will close the year in the No. 1 spot on our pound-for-pound list. But Jones fast is approaching two years since his most recent fight – and if he’s not active before then, he’ll drop off our list until he fights again. If that happens, UFC welterweight champ Kamaru Usman, sitting at No. 2, could make his ascension to the top spot. Rounding out the men’s top five are UFC middleweight champ Israel Adesanya, former UFC flyweight champ Demetrious Johnson and UFC heavyweight champ Francis Ngannou
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