MIAMI - The Miami Dolphins have placed Tua Tagovailoa on injured reserve after the quarterback was diagnosed with his third concussion in two years.
Tagovailoa will be sidelined for at least four games.
He will be eligible to return in Week 8 when the Dolphins host Arizona, but has to complete a series of tests and assessments required by the NFL's concussion protocol before he can return to the field.
Coach Mike McDaniel has cautioned against speculation on the quarterback's future, stressing that he's more focused on Tagovailoa getting healthy than what this latest concussion means for the team or for his career.