Miller left during the fourth quarter. He had run the ball 10 times for 14 yards before leaving with the injury. Damien Williams replaced Miller on the next drive.
Last season, Miller played in all 16 games, carrying the ball 216 times for 1,099 yards and eight touchdowns.
The Dolphins signed running back Raheem Mostert last week, but he is primarily a returner. Jay Ajayi, a 2015 draft pick, is on short-term injured reserve. Former Patriots running back Jonas Gray is on Miami’s practice squad.
After two road games to start their season, the Dolphins will return home in Week 3 to face the Buffalo Bills.
– Rohan Nadkarni