Michael Chiesa challenges referee Mario Yamasaki to a grappling match

Michael Chiesa is still looking to set thing straight from his controversial loss to Kevin Lee last month, but this time he’s approaching things with a different angle.
The top 10 UFC lightweight has officially challenged referee Mario Yamasaki to a grappling match in the headlining slot of the Onnit Invitational event on Sept. 30. This unusual challenge comes after the controversial stoppage made by Yamasaki in Chiesa’s UFC Fight Night 112 main event fight against Kevin Lee.“O