President Donald Trump initially said no Americans were injured in the retaliatory missile strikes on Al-Asad air base in Iraq.
Tom Savage was finally pulled from game due to a concussion.
"That's just hard to watch," Fox announcer Joe Buck said.
These professionals may be the last line of defense protecting players from longterm head injury.
The league's $30 million deal with the National Institutes of Health to study CTE is dissolving in acrimony.