Vaki left practice early Thursday with a shoulder injury, Tim Twentyman of the Lions' official site reports.
Vaki played safety and running back at Utah last season before being selected by the Lions in the fourth round of the 2024 NFL Draft. However, the 23-year-old is expected to be used exclusively on offense in Detroit. Any potential missed time during training camp could make it difficult for Vaki to push past Craig Reynolds and carve out consistent snaps on offense early in the season.