Now, it looks as though the 49ers may be down yet another running back, as Isaac Guerendo was forced out of Sunday’s game against the Bears with a sprained foot. While he’s considered day-to-day, San Francisco has a short week this week,

The San Francisco 49ers didn't anticipate getting down to a fourth-string running back, but they may find themselves in that situation entering a Week 15 showdown with the Los Angeles Rams on Thursday night at Levi's Stadium.