Tua Tagovailoa is going back into the concussion protocol for the second time this season.

Miami Dolphins head coach Mike McDaniel confirmed the news on Dec. 26 and says that the starting quarterback could miss this week’s crucial contest at the New England Patriots.

The former Alabama quarterback was ruled to be in the concussion protocol after experiencing symptoms after the 8-7 Dolphins’ home loss to the Green Bay Packers on Christmas.

ESPN’s Adam Schefter points out that the play that could’ve caused the concussion like symptoms was from the second quarter when Tagovailoa slams his head on the ground.

Tagovailoa was previously in concussion protocol after exiting a Sept. 29 game at the Cincinnati Bengals. However, there was much debate that Tagovailoa actually sustained a concussion the prior week against the Buffalo Bills despite the Dolphins’ medical staff clearing him to remain playing.

With the addition of new head coach Mike McDaniel along with speedy receivers Tyreek Hill and Jaylen Waddle, this has been the best season of Tagovailoa’s pro career. In his third season, the 24-year-old has amassed 3,548 yards, 25 touchdowns and 8 interceptions with a QBR of 68.7.

If Tagovailoa can’t play, the Dolphins will turn to veteran backup Teddy Bridgewater to make his second start of the season.