49ers quarterback Brock Purdy suffered a torn UCL and will be sidelined for at least six months. NFL Media’s Tom Pelissero had the initial report. Purdy sustained the injury in San Francisco’s first series when he was hit by Eagles defensive end Haason Reddick as he was throwing. The rookie signal caller eventually re-entered the game when QB Josh Johnson went down with a concussion, but the nature of the injury didn’t allow him to throw the ball more than a couple times on short screen passes. Schefter reported the 49ers are recommending surgery, but Purdy will seek other opinions.…