The Dolphins placed quarterback Malik Willis on injured reserve, the team announced.
Willis has had a groin injury that has limited his mobility, and an MRI showed it developed into a core muscle injury, Tom Pelissero of The Ringer reports.
Pelissero said the injury is not season-ending.
The Dolphins have Kyle McCord behind Willis, along with Brady Cook on the practice squad. McCord, a sixth-round pick of the Eagles in 2025, has never seen action in a regular-season game.
He presumably will start Sunday’s game against the Colts.
Willis will miss at least four games before returning.
He has a 58.2 percent completion percentage for 1,396 yards with six touchdowns and six interceptions.
The Dolphins also announced they placed defensive lineman Zach Sieler on injured reserve and waived cornerback Reese Taylor.