Reports surfaced that Dak Prescott is planning to have a second MRI on his shoulder. After the Dallas Cowboys released a tweet saying 'it's not a reason to worry.' Dak responded saying 'there's no doubt' he'll be ready Week 1 vs the New England Patriots. Emmanuel Acho explains why it's a mistake for Dak to guarantee he'll play Week 1. 'Don't set expectations high and then not meet the expectation.'