Watch: Bill Belichick's beef with Eric Mangini began as a friendship and ended with a tarnished legacy

Bill Belichick took Eric Mangini under his wing in Cleveland. Back in the early 90s, Belichick was just starting out his head coaching career while Mangini was a simple ball boy for the Browns. Out of that meeting bloomed a beautiful friendship that lasted for many years... until Mangini took the head coaching job with the Jets and reported Belichick to the league for spying. Beef! Directed and edited by Ryan Simmons Written and produced by Will Buikema