To change your username on ESPN Tournament Challenge, you must update your display name through your ESPN account settings rather than within the game itself. Log in to your ESPN account, go to your profile or account settings, and edit your display name if the option is available; however, ESPN often restricts username changes once a bracket group or contest has started to maintain fairness and tracking consistency. If editing is not allowed, the only workaround is creating a new account before joining future tournaments, but this means losing previous entries and history.

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