Contreras (hamstring) was seen doing agility drills on the field Tuesday, Jesse Rogers of ESPN.com reports.
The young backstop continues to slowly work his way back from a hamstring strain that has kept him on the shelf since Aug. 9. Contreras should start to ramp up his activity in the next week, and while he still has a ways to go in his recovery, he's headed in the right direction. Barring any setbacks, Contreras could be back with the Cubs sometime in mid-September. In the meantime, Alex Avila and Rene Rivera will split duties behind the dish.