Long planted veteran defensive lineman Nate Collins in an early drill, and afterwards Collins made a point to note Long's strength. Several offensive linemen, including left tackle Jermon Bushrod noticed his work as well.
Remember, Long has some extra work to do this summer after NFL/NCAA rules prevented him from participating in most of the Bears' offseason workouts. He is technically competing with James Brown for the right guard job, but most of us expect him to assume that role as soon as he is anywhere close to being ready for it.
Based on reports from Sunday's practice, that time could be coming relatively soon.
Here is an on-site report on Long's day from Jeff Dickerson of ESPNChicago.com.