The age at which you can legally bet on underdog or any type of sports betting varies by jurisdiction. In the United States, for example, the legal gambling age typically ranges from 18 to 21 years old, depending on the state. Some states allow sports betting at 18, while others require bettors to be 21.
It’s important to check the local laws and regulations in your area to determine the legal age for sports betting. Always ensure that you are of legal age and that you are betting through a licensed and regulated sportsbook or betting platform. If you are unsure about the legal age in your jurisdiction, you can consult local gambling laws or visit the website of a reputable gambling authority for more information.