It's definitely a good idea. Really a guy should wear a jockstrap or compression for all sports, especially if a cup is required (contact sports). Briefs might be ok if they are tight enough to support you, but boxers wouldn't be a good idea.
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Really the best type of underwear for sports is a jockstrap. If you're playing a sport where you need a protective cup, it can hold it in place. Even if you don't need a cup, jockstraps keep you in place while you work out, better than other underwear.
Yes, it's important for men and boys to wear tight underwear so that their penis and testicles are supported. There is a risk of testicular torsion if things bounce around too much.