He absolutely dominated Edwards when they fought before and has honestly improved twice as much as Leon has as a fighter in the time that's passed since then too so I don't really see any basis for that claim. Colby is probably his easiest matchup in the top outside of that 5 too; he's
much weaker, smaller and shorter, has less leverage in grappling situations, and has no actual punching or striking power in general threaten Usman with in the standup. By strictly NCAA credentials Colby is supposed be a better wrestler... but in terms of MMA wrestling displays Colby has been reversed on the ground and taken down by much smaller, weaker wrestlers like RDA. Usman conversely has never been taken down at all in any fight in his UFC career and has been able to takedown literally every opponent he's made an attempt to.
Unless Kamaru's cardio and weight cut are horribly botched and he gasses VERY early I don't see any path to victory for KKKovington whatsoever; he isn't strong enough to hold Usman against the fence let alone on the ground for any appreciable amount of time if he does take him down, and his striking isn't anywhere near technically sound or dangerous enough to threaten him with standing up either (Usman handily outstruck Woodley and RDA, 2 infinitely more dangerous strikers; Colby got touched up by old man Maia in multiple exchanges in their fight
). I think he's gonna turtle and freeze up when he realizes how badly outmatched he is strength and leverage wise and get knocked out shortly afterwards, cause unlike him Usman has dynamite in those hands when he lets them fly:
Can't wait