Seals-Jones exited Thursday's practice session early due to an apparent right leg injury, John Keim of ESPN.com reports.
Seals-Jones was helped off the field by trainers, and he was only able to walk gingerly. The 26-year-old tight end has an opportunity to earn a key depth role behind Logan Thomas in Washington, but those chances could dry up if he's forced to miss a significant portion of training camp.