Read our coverage: https://bayareane.ws/2Oi01Bf Oakland Raiders quarterback Derek Carr talks about how he values joint practices more than preseasons games and his reaction to HBO's "Hard Knocks." Video by Aric Crabb/Bay Area News Group ------------ SUBSCRIBE TO SUPPORT LOCAL JOURNALISM Mercury News http://bayareane.ws/2ClQyyV East Bay Times http://bayareane.ws/2qhvSql WATCH MORE VIDEOS: https://www.youtube.com/user/Mercurynews LET’S CONNECT Mercury News Facebook @ https://www.facebook.com/mercurynews Instagram @ https://www.instagram.com/mercnews/ Twitter @ https://twitter.com/mercnews East Bay Times Facebook @ https://www.facebook.com/eastbaytimes/ Instagram @ https://www.instagram.com/ebtimes/ Twitter @ https://twitter.com/EastBayTimes