San Francisco 49ers star Trenton Cannon has been rushed to hospital following a horror injury sustained during the opening kick-off against the Seattle Seahawks on Sunday night.The NFC West division clash began in the worst possible way as the 49ers running-back suffered a major concussion, which led to an ambulance making it's way onto the field after just four seconds of play.In an attempt to tackle Seattle's punt returner DeeJay Dallas, Cannon collided with his own teammate, before medics were rushed to the scene.
Cannon then left the field in the ambulance, and was rushed to a nearby hospital.As the 49ers attempted to stop Dallas on the punt return, Cannon's head rammed into the leg of teammate Talanoa Hufanga, and the impact caused his.
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