49ers' Jerick McKinnon: Still doing conditioning work

McKinnon (calf) and Matt Breida (shoulder) both went through conditioning drills in full uniform at Tuesday's practice, Cam Inman of The San Jose Mercury News reports.

The 49ers have been cautious with their injured running backs, limiting them to side work for the past week despite the expectation that both will be fine for the Sept. 9 opener in Minnesota. McKinnon and Breida seem on track to return to team drills next week after the team cuts its roster down to 53 players. Alfred Morris is making a strong case for a spot, but there hasn't been any indication that he represents a serious threat to McKinnon's expected workload -- or Breida's -- early in the season.