Smith (foot/ankle) exited Sunday's practice early, Mike Reiss of ESPN.com reports.
Reiss notes that the tight end "got tangled up with a defensive back in a low-speed 1-on-1 drill, landed a bit awkwardly, and limped off" during the session. Given that Smith didn't end up returning to the field, we'll consider him day-to-day for now. Meanwhile, fellow free-agent addition Hunter Henry (shoulder) returned to practice Sunday.