Kamaru Usman is one of the most feared men in the UFC, and he fired a warning shot at another UFC star in Conor McGregor.

UFC: Kamaru Usman Fires a Warning Shot at Conor McGregor

After Conor McGregor’s blisteringly fast 40-second knockout victory against Donald Cerrone, he already has his eyes locked on his next target. Everything from a Khabib Nurmagomedov rematch to a battle against Jorge Masvidal for the BMF are on McGregor’s radar. If McGregor plans on trying his hand at a new weight class, then Kamaru Usman, …