Bill Belichick is considered by many to be the greatest NFL coach of all time. On Sunday, he won his 300th game. So how did Belichick become the standard of excellence in the NFL? ESPN's Bill Barnwell joins Mina to discuss the Patriots' dominant win over the Browns. Then, Senior Writer Ian O'Connor - who wrote the book on the Patriots' coach - takes a deep dive into Belichick's football legacy and where he goes from here.