Hartman signed with the Commanders' practice squad Wednesday.
Hartman sat out for most of training camp due to a shoulder injury, but he will stick around in Washington to serve as the team's practice squad quarterback. Marcus Mariota (groin) and Jeff Driskel are slated behind 2024 No. 2 overall pick Jayden Daniels on the depth chart. Hartman would figure to move up to the active roster should either of those three quarterbacks miss time.