31 Raheem Mostert RB

Mostert (undisclosed) didn't participate in Wednesday's minicamp practice, CSN Bay Area's Matt Maiocco reports.

Mostert reportedly sustained some sort of soft-tissue injury, but the details of the affliction aren't clear. The 49ers have issued no timetable for Mostert's return to full activities.

Mostert was promoted from the 49ers' practice squad to the active roster Saturday, ESPN's Adam Caplan reports.

Mostert appeared in two games with the Bears earlier this season, and will provide depth at running back for the 49ers in Week 17 with Carlos Hyde (knee) on IR.

Mostert was promoted to the Bears' 53-man roster Wednesday, Scott Krinch of CSNChicago.com reports.

Mostert has appeared in 11 NFL regular season games with three teams after going undrafted in 2015. He has yet to record a rushing attempt, however, instead spending all of his time as a kick returner. He'll fill in the No. 4 spot at running back in Chicago behind Jeremy Langford, Ka'Deem Carey (hamstring) and Jordan Howard.

Mostert (hamstring) was released after the team claimed running back George Atkinson, Mary Kay Cabot of Cleveland.com reports.

Mostert seemingly had the No. 3 running back spot locked up after he survived Cleveland's last round of cuts to get its roster down to 53, but clearly that wasn't the case. The 24-year-old hasn't seen much action over the past couple of weeks, dealing with a hamstring injury that forced him to miss the last two preseason games. His inability to recover quickly could've ultimately been his downfall. If Mostert clears waivers, he could find a home on the practice squad.

Mostert (hamstring) survived roster cuts and will serve as the No. 3 running back, according to the team's official website.

Despite missing the last two preseason games with a hamstring injury, the Browns must've seen enough from the 24-year-old back out of Purdue to keep him on the roster. Mostert will back up Isaiah Crowell and Duke Johnson, which most likely means playing time will be hard to come by. He appeared in a total of 11 games last season for three teams but was used primarily on special teams as a kick returner. The former Raven has yet to make a rushing attempt in a regular season NFL game.