Q. When a city and a state are mentioned in a sentence, am I correct in placing commas after the state name as well as before the state name? “Mary traveled to Seattle, Washington, before going on to California.” And when “Jr.” follows a name in a sentence, is it necessary to add a comma before it? How about after it?

A. Yes. No. Only if you put one before it. (That is, the commas around “Jr.” are optional.)