This unfortunate incident is a testament to better pre-fight screenings. I am just now watching the fight between Diaz/Rodriguez, and it is clear that there was some neurological issues with Diaz before the fight.

He was pulling his punches from the first and second round and was barely moving his head. People would look at it and say well he was just inexperienced, but a professional fighter like Diaz should not have had those types of issues.

If anything, Rodriguez could have jumped on him early and ended it before the 4th. Diaz was clearly not in shape for this fight.