Who will 49ers backup RB be against the Bears in Week 14?

So, what’s the 49ers RB depth chart look like for Sunday?

The San Francisco 49ers’ exceedingly deep backfield thinned out rapidly when running backs Christian McCaffrey and Jordan Mason both went down with injuries during the team’s Week 13 loss to the Buffalo Bills.

McCaffrey is already on Injured Reserve because of a PCL injury in his knee, and Mason is expected to land there with a high ankle sprain. That leaves rookie running back Isaac Guerendo atop the depth chart with only unproven players behind him.

It stands to reason Guerendo will play a lion’s share of the snaps. If he does, expect RB Patrick Taylor to work in as the backup for now. He was with the team throughout the offseason and played in the team’s first eight games of the regular season. In those contests he primarily contributed on special teams, but he also had seven carries for 25 yards and one reception for 12 yards.

His familiarity with the offense should make him head coach Kyle Shanahan’s trusted No. 2 RB in Sunday’s showdown with the Chicago Bears.

Recently-acquired RB Israel Abanikanda figures to work in as the No. 3 RB behind Taylor. Shanahan on Wednesday said he’s familiar with Abanikanda after scouting him in the 2023 draft.

“I liked him coming out of college,” Shanahan said. “I haven’t studied him a ton in the NFL, but he was a guy that I had good notes on from college and liked. And I know our scouting department thought he was the best guy out there being available and stuff. So in our situation, especially glad to get him here.”

While Shanahan liked him in the draft, that doesn’t mean he’ll automatically step into a huge role. The 49ers on Tuesday claimed him off waivers which means he’s had only three practices with the team. His lack of familiarity with the offense may limit him early and relegate him to a backup role even if Taylor steps into a larger workload.

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