In Miami, the Dolphins are preparing for preseason under new head coach Jeff Hafley. Hafley is emphasizing the value of mistakes as his team trains. He believes that making mistakes during practice can be beneficial for the team's growth.

Hafley's approach is focused on helping his young team learn and improve. While he does not want to see errors on game days, he encourages his players to push beyond their limits during training. This strategy is part of the team's preparation for the upcoming season.

Further details on the Dolphins' preseason preparations are available from the source. The team is working under Hafley's guidance to develop their skills and build a strong foundation for the season ahead.