A storm hit the Cowboys' practice facility on Saturday, injuring twelve people, including special teams coach Joe DeCamillis, who suffered a broken back.
About sixty others escaped with just cuts and bruises.
High winds ripped through the roof during a rookie minicamp practice, causing debris to fall on the field.
"Right now, I think we don't have anybody who is in a life-threatening situation," said Dr. Paul Pepe, head of emergency medical services for Dallas County.
Coach Suffers Broken Back At Cowboys Camp