Hightower won't practice Tuesday due to a groin injury, Zach Berman of The Athletic reports.
The severity of the injury is unclear, but the 2020 fifth-round pick will have to return to practice quickly if he has any shot of making the initial 53-man roster. Hightower played 346 offensive snaps over 13 games as a rookie, but he spent the majority of last season on Philadelphia's practice squad, totaling just 11 snaps during his lone appearance of the campaign -- Week 9 against the Chargers.