Las Vegas believes Ashton Jeanty sprained his ankle in Sunday practice, with sources saying the injury is not considered long term even as the team remains unsure about his exact timeline.
Sunday's injury came when Jeanty dove for a low Kirk Cousins pass, landed awkwardly on the turf and left unable to put weight on his right leg as teammates knelt and prayed.
Mike Washington Jr. took the first-team reps after Jeanty exited and had already been alternating starting work with him during a strong training camp.
Jeanty, the No. 6 pick in the 2025 draft, rushed for 975 yards and 5 touchdowns as a rookie and was expected to anchor a run-heavy offense under first-year coach Klint Kubiak.
Las Vegas opens its season against Miami on Sept. 13, with depth behind Jeanty including Washington, Dylan Laube, Roman Hemby and Dare Ogunbowale.