HR 1 - Does Al Horford have beef with the Celtics?

On top of the dominant performance against the Warriors by the Celtics, it was Al Horford who made the most noise by saying him leaving Boston was about more than basketball. What could Big Al be referring to? Then, Jaylen Brown added a triple-double to his season resume making it harder to ignore how legit of an MVP candidate he's becoming., And, Marcelo Mayer's spot on the Opening Day roster is no longer guaranteed according to Alex Cora.