Lewis (concussion) has ramped up baseball activities in recent days but remains without a firm return timetable, the Associated Press reports.

EDGE Analysis

Lewis' recovery from a concussion has been rather drawn out, as the slugging outfielder has been on the injured list since June 1. The fact Lewis remains without a timetable for his return underscores the unpredictable nature of head injuries, but he is reportedly showing gradual improvement.