Minnesota Vikings-Arizona Cardinals Day 2 joint practice notes; Do the Vikings have enough depth behind Alex Mattison and should they add a running back; N'Keal Harry was released and free agent safety Jake Jervais; Brian Asamoah rotates back in with the first team; Mekhi Blackmon back with the first team defense; Byron Murphy Jr will have his hands full; TJ Hockenson still off to the side doing individual drills; Brian O'Neill is back with team drills.\nLearn more about your ad choices. Visit megaphone.fm/adchoices