Miami, Florida - NFL star Tua Tagovailoa says he was "wondering what happened" after being knocked unconscious by a big hit in the Miami Dolphins' defeat to the Cincinnati Bengals.

The Dolphins quarterback was briefly hospitalized after hitting his head on the ground while attempting to extend a play during a 27-15 Week 4 loss.

Tagovailoa has not played since, but he cleared the concussion protocols last weekend and is set to start against the Pittsburgh Steelers on Sunday.

The 24-year-old has spoken for the first time about the injury he sustained on September 29.

He said: "I wouldn't say it was scary for me at the time because there was a point where I was unconscious, so I couldn't really tell what was going on."

"When I did come to and kind of realized what was going on and what was happening, I didn't think of anything long term or short term. I was just wondering what happened."

Tagovailoa has vowed to learn from the experience and change his approach where necessary.

"Throwing the ball away hasn't been something that I've done in the past really well," he said.

"Because I'm trying to make plays, and so just learning from that – if it's not there, it's okay to throw it away. It's the longevity of me just being able to be the quarterback for this team and not try to make something out of nothing."

Miami started the season with three consecutive wins but are now 3-3 after three defeats in a row.

Tagovailoa warned he will not be returning with a magic wand to ensure their fortunes are turned around immediately.

"I just gotta be myself – I'm not the savior of this team. I don't just come in and we start winning games," he said.