Coach Kyle Shanahan said Taylor (foot) may not return after eight weeks on injured reserve, Cam Inman of The San Jose Mercury News reports.
After being placed on IR on Sept. 20, Taylor had a chance to return to the lineup Week 11 against the Cardinals, but a setback will extend his recovery time. However, he hasn't been ruled out for the year. The third-year pro likely will have a limited role in the offense if he's able to return after the 49ers acquired Emmanuel Sanders via trade from the Broncos.