Maybe they did everything right.

Maybe the medical professionals tasked with ensuring the immediate and long-term health of Miami Dolphins quarterback Tua Tagovailoa on Sunday and leading up to Thursday night’s game followed concussion protocol to perfection.

It’s still impossible to shake the notion that the 24-year-old quarterback had no business playing as he did on Thursday.

The images of Tagovailoa lying on the ground after sustaining a violent hit — his body seizing and soon after loaded onto a stretcher for transportation to a hospital — will remain in our memories for some time. Maybe forever.

And because that incident came four days after we saw Tagovailoa’s head slam on the ground, saw him stumble to his feet, shaking his head and trying to get his bearings, saw him staggering around before teammates alerted their sideline to the need for medical attention, it’s impossible to avoid wondering about a connection between the two incidents and if the second, and more serious, could have been avoided.

Thankfully, before the ambulance had even arrived at the Cincinnati area hospital, it was learned that Tagovailoa had movement in all of his extremities. And by night’s end, he was discharged from the hospital and flying back to Miami with his teammates.

But the NFL can’t have a repeat occurrence. Ever.

Maybe the protocols in place are doing their jobs. Maybe they’re not. It’s hard to say after what we saw Thursday night.