More than a month after entering it, Tua Tagovailoa has cleared the NFL's concussion protocol, according to a source.

Tagovailoa was diagnosed with his second concussion of the season after hitting his head during the Miami Dolphins' loss to the Green Bay Packers on Christmas Day.

He was placed into the protocol the next day and missed the team's final three games of the season.

He missed the better part of six games after sustaining concussions in Week 4 and Week 16. The NFL and NFLPA launched two joint reviews into how his head injuries were handled this season, the first of which resulted in the termination of an unaffiliated neurological consultant who had cleared him to play after he hit his head in Week 3 and stumbled shortly after.

The league altered its concussion protocol as a result of that same joint review.