Ravens outside linebacker Steven Means was injured early in the second quarter.
He went down during a Raheem Mostert run that lost 3 yards with 14:14 left until halftime. Means could not put any pressure on his right foot as the cart came out to transport him to the training room.
The Ravens quickly ruled him out with an ankle injury.
The Ravens took an early 7-0 lead and could have had more after reaching the Dolphins 1-yard line, but a fourth-down stop by Miami changed the momentum. The Dolphins have tied it up 7-7 on a Jaylen Waddle 6-yard touchdown catch.