NFL under fire after Dolphins quarterback hospitalized

The NFL's concussion protocol came under scrutiny after quarterback Tua Tagovailoa was hospitalized days after he was injured in another game.
2:20 | 09/30/22

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Transcript for NFL under fire after Dolphins quarterback hospitalized
THANK YOU, MARTHA. >>> WE TURN NOW TO THE FRIGHTENING MOMENT ON THE FIELD SEEN BY MILLIONS. THE MIAMI DOLPHINS QUARTERBACK GOING DOWN, THE HEAD INJURY, HIS HANDS APPEARING TO CURL. MOMENT.AT SIGNALED IN THIS - SECOND SERIOUS HIT IN A MATTER OF DAYS. THE NFL FACING INTENSE SCRUTINY OVER ITS PROTOCOL. HERE'S ERIELLE RESHEF. >> DOWN HE GOES! >> Reporter: IT WAS THIS TERRIFYING INJURY SEEN BY MILLIONS, A SECOND HEAD HIT IN LESS THAN A WEEK FOR THE QUARTERBACK OF THE MIAMI DOLPHINS, TRIGGERING AN INVESTIGATION INTO THE TEAM'S HANDLING OF THE NFL'S CONCUSSION PROTOCOL. TUA TAGOVAILOA SACKED IN LAST NIGHT'S GAME AGAINST THE BENGALS. HIS BACK AND HEAD SLAMMING THE TURF. YOU CAN SEE HIS FINGERS SEIZING, WHAT'S KNOWN AS FENCING. >> IT'S A NEUROLOGICAL RESPONSE TO HEAD TRAUMA. >> THIS POSTURING RESPONSE CERTAINLY SIGNIFIES THAT A HEAD INJURY HAS OCCURRED, BUT DOES NOT REALLY TELL US ANYTHING ABOUT THE SEVERITY OF THAT HEAD INJURY. >> Reporter: TUA WENT TO THE HOSPITAL BUT LATER FLEW HOME WITH THE TEAM. THE DOLPHINS LAST NIGHT ANNOUNCING HE SUFFERED HEAD AND NECK INJURIES. >> THE BEST NEWS THAT WE COULD GET IS THAT EVERYTHING HAS CHECKED OUT, THAT HE DIDN'T HAVE ANY -- ANYTHING MORE SERIOUS THAN A CONCUSSION. >> Reporter: BUT THE WORRY IS REPEATED CONCUSSIONS. JUST FOUR DAYS EARLIER, TUA WAS KNOCKED TO THE GROUND AND HIT IN HIS HEAD IN A GAME. >> OOH, HE'S WOOZY. >> Reporter: STAGGERING ON THE FIELD AFTERWARDS. TUA WENT BACK IN THE GAME. THE DOLPHINS SAYING IT WAS A BACK AND ANKLE INJURY, NOT A CONCUSSION WHICH WOULD HAVE SIDELINED HIM. AN INDEPENDENT DOCTOR THEN GIVING THE GREENLIGHT TO PLAY LAST NIGHT. MIAMI'S COACH TODAY INSISTED TUA HAD BEEN CLEARED BY SEVERAL MEDICAL PROFESSIONALS. >> IF THERE WOULD HAVE BEEN ANYTHING LINGERING WITH HIS HEAD, I WOULDN'T HAVE BEEN ABLE TO LIVE WITH MYSELF AND PUT HIM IN HARM'S WAY. >> Reporter: BUT CRITICS OF THE NFL'S HANDLING OF HEAD INJURIES BELIEVE TUA SHOULD NOT HAVE BEEN BACK ON THE FIELD. >> NOW WE HAVE TO WORRY ABOUT WHAT THIS IS GOING TO DO FOR THE REST OF THE SEASON AND REALLY HOW THIS IS GOING TO AFFECT HIM THE REST OF HIS LIFE. >> Reporter: DAVID, AS FOR TUA TONIGHT, HE SAYS THAT HE IS FEELING MUCH BETTER AND IS FOCUSED ON RECOVERING SO HE CAN GET BACK ON THE FIELD. THE NFL AND PLAYERS' ASSOCIATION ARE CONDUCTING A JOINT INVESTIGATION. DAVID? >> IT WAS A HORRIFIC MOMENT.

This transcript has been automatically generated and may not be 100% accurate.

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