Tagovailoa (concussion) is listed as questionable for Sunday's game against the Cardinals after practicing fully both Thursday and Friday and is in line to play, Marcel Louis-Jacques of ESPN.com reports.
Tagovailoa -- who has cleared the NFL's concussion protocol -- remains on injured reserve for the time being, but once he's officially activated by the Dolphins on Saturday, it's possible that his current questionable designation will be lifted. In any case, Tagovailoa is poised to return to action Sunday after a four-game absence, and at this stage, there's more uncertainty surrounding who is slated to back him up Sunday.