Mostert (chest) was listed as a non-participant during Tuesday's walk-through practice, Cameron Wolfe of NFL Network reports.
The Dolphins have labeled Mostert as a non-participant on both of their first two Week 2 injury reports after he logged 28 snaps and carried six times for nine yards while adding two receptions for 10 yards on three targets in Sunday's 20-17 win over the Jaguars. While the team hasn't suggested that Mostert's injury is a major concern, he may need to get in some listed practice activity Wednesday to avoid carrying an injury designation into Thursday's game against the Bills.