The Major League home-run champion, Giancarlo Stanton. A comma is needed because he’s the only ML home-run champion. (Image courtesy mlb.com) This message came over the transom the other day: Hi Ben!

How do you know whether or not to set something off in commas in a sentence? Are the added words essential (restrictive) or not (nonrestrictive)? that limits the meaning of what it modifies. And it ...