Fans can see controversial cornerback Terrion Arnold work out for the Seahawks during the latest episode of HBO's Hard KnocksIt could be challenging to find interesting content for “Hard Knocks” at Seattle Seahawks' training camp. Former first-round draft pick Terrion Arnold, who faces felony charges of robbing and kidnapping, arrived at the Seahawks' facility on Sunday to work out for the team. Hard Knocks gave fans a closer look at this notable development, via NFL insider Jordan Schultz. A look at the #Seahawks working out CB Terrion Arnold earlier this week, as shown on Hard Knocks. Terrion Arnold, an All-American with Alabama, has struggled profusely to find his footing in the NFL over the last two years.