Wear a hat because they are your team. You owe that much to fans who have defended their franchises for decades and lived through heartache and sorrow when they lose.

When it comes to backward-hat etiquette, there are obvious, implicit dos and don’ts. (Don’t wear one to a formal occasion, like a wedding.) ...

Wear a baseball cap to keep rain out of your eyes. (Glasses or sunglasses can help too, but without a visor, the water will just drip down your forehead.) ...