Cook will be a three-down back, but they need a reliable third-down option, the tweet went on to say. That could be Ham, especially if the rookie Mattison isn't up to speed by the time the season starts.
MIN RB Alexander Mattison - Week 3 Fantasy Football Outlook
Week 3 vs. Oakland Raiders
Alexander Mattison is somewhat involved in Minnesota's offense. He had a larger role in Week 1 due to the blowout, but played just eight snaps in Week 2 (12% of the offensive plays) while getting only four touches. He's not worth fantasy consideration at the moment.