Dolphins place QB Tua Tagovailoa on injured reserve after latest concussion

The Miami Dolphins placed Tua Tagovailoa on injured reserve Tuesday 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.

Tagovailoa was hurt last Thursday night when he collided with Buffalo defensive back Damar Hamlin. He ran for a first down and then initiated the contact by lowering his shoulder into Hamlin instead of sliding.

Players from both teams immediately motioned that Tagovailoa was hurt, and as he lay on the turf the quarterback exhibited some signs typically associated with a traumatic brain injury. He remained down on the field for a couple of minutes, got to his feet and walked to the sideline. The Dolphins diagnosed him with a concussion a few minutes later.

Coach Mike McDaniel has since 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. Tagovailoa this week began the process of consulting neurologists about his health amid reports that he has no plans to retire.

Others around the NFL have offered their opinions on Tagovailoa's future, including Raiders coach Antonio Pierce, who suggested he should retire.

"As far as Tua's career is concerned, I think it's an utmost priority of mine for Tua to speak on Tua's career," McDaniel said Monday. "Reports are reports. As far as I'm concerned, I'm just worried about the human being and where that's at day to day. I'll let Tua be the champion of his