Olszewski (undisclosed) was not seen at Thursday's joint practice against the Giants, Ryan Hannable of WEEI.com reports.
It is not clear why Olszewski wasn't at practice. After a prolific season as the Patriots' primary return man, the 24-year-old was selected to the AP 2020 All-Pro First Team as a special teamer. If he is unable to go for the final preseason game Sunday, expect J.J. Taylor and Kyle Dugger to share Olszewski's vacant reps.