San Francisco 49ers star Dre Greenlaw suffers heartbreaking injury during Super Bowl first half as he 'tears his left Achilles' while running onto the field... and is then carted back to the locker room

San Francisco 49ers linebacker Dre Greenlaw has 'torn' his left Achilles in the Super Bowl, while waiting to come back on the field in the first half. He was taken back to the locker room on a cart.