This is why I loathe parentheses in quotes

Peter King makes the biggest media gaffe of Super Bowl week because why?
Because he's not content to let a quote stand on its own. He uses parentheses to insert (Steelers) when Roger Goodell did not specifically say he talked to two dozen Steelers, but to two dozen players.
And what of it? Well, King was wrong. Flat wrong. He inserted the error into his own copy.
The lesson all writers/editors should learn: If the quote can't go without parentheses, either it's not worth a darn or you're not setting it up correctly. A quote should stand on its own. People should be able to gather what the source meant when he said it.