The 49ers traded for a running back this week as they acquired Brian Robinson Jr. from the Washington Commanders, and then got a decent performance from another as Jeff Wilson Jr. made his case for a place on the 53-man roster.

Wilson went at 3.7 yards per carry as he finished with 41 yards and a touchdown in the 49ers’ exhibition win over the Los Angeles Chargers.

He would seemingly have a tough task to crack the roster following Robinson’s arrival with Christian McCaffrey starting and Isaac Guerendo and Jordan James also among those hoping for consistent regular-season snaps.

Shanahan confirmed the 49ers acquired Robinson to be their primary backup to McCaffrey in his postgame press conference after the win over the Chargers.

“We brought him here to be our two back,” Shanahan said of

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