The San Francisco 49ers had a scary moment at their training camp when defensive end Tarron Jackson collapsed on the field. According to reports, Jackson collapsed after being blocked during an 11-on-11 team drill. Trainers rushed to Jackson’s side, and moments later, he was placed on a stretcher. “He’s conscious inside communicating with us. He can feel all his extremities, and they’re taking him down to Stanford now just for further testing,” head coach Kyle Shanahan said. The New York Post has more: Practice did continue after the incident. “It’s always hard like that, especially when guys watch that,” Shanahan...