Coach Kyle Shanahan said the 49ers hope Mitchell merely suffered a shoulder stinger during Sunday's 17-11 victory at Philadelphia, Nick Wagoner of ESPN.com reports.
Mitchell missed some time in the second half Sunday, but his return was necessitated when fellow rookie Trey Sermon suffered what was eventually confirmed to be a concussion in the fourth quarter. The fact Mitchell was able to come back in the game bodes well for his health in the short term, and he again led the 49ers backfield in touches, with his 19 going for 53 yards from scrimmage. Aside from Mitchell and Sermon, JaMycal Hasty turned nine touches into 59 total yards before injuring his ankle in the final quarter. With all of the trio tending to health concerns, it'll be worthwhile to monitor the overall situation closely as San Francisco prepares to host the Packers next Sunday.