Complex sentence: Veeck noted that part of the manager's job is to argue the call instead of letting the pitcher do the arguing in order to protect the pitcher from ejection, and Hornsby broke a cardinal rule of baseball by not doing so.
Split into simpler sentences: Veeck noted that part of the manager's job is to argue the call instead of letting the pitcher do the arguing in order to protect the pitcher from ejection. He believed Hornsby broke a cardinal rule of baseball by not doing so.