Diego had no hands on the mat. He also had 1 knee off the mat. Doesn't only 1 knee on the mat make it legal? Also what's Corey Anderson's walkout music, this stuff is funky.
its a stupid rule imo. one thing is the guy laying down and you go and knee him. something else is a guy in position to get up at any point then you knee him. these rules cant be black and white, or this happens.