Brian Kelleher, Umar Nurmagomedov, Max Holloway, Francisco Rivera, Nate Landwehr, Ricky Simon, John Moraga, Alexandre Pantoja, John Dodson, Manel Kape, Aiemann Zahabi, Raul Rosas Jr, all have at least one clean knockout with their hands. Of course there are many more. This is not even mentioning...