SANTA CLARA (AP) — Backup quarterback Nick Mullens signed his exclusive rights tender with San Francisco and the 49ers also signed undrafted running back Salvon Ahmed to a three-year deal Friday.

Mullens was tendered a one-year deal in March and officially signed it Friday. He showed promise in place of injured starter Jimmy Garoppolo in 2018 and is eligible to become a restricted free agent next offseason.

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Ahmed ran for 2,106 yards and 21 TDs on 353 carries in three years in college at Washington. He also caught 50 passes for 331 yards.

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Ahmed joins Jamycal Hasty as undrafted running backs signed by San Francisco this week.

The other undrafted players the Niners signed are cornerback DeMarkus Acy, defensive lineman Darrion Daniels, receiver Chris Finke, linebacker Jonas Griffith, tight end Chase Harrell, fullback Josh Hokit, safety Jared Mayden and quarterback Broc Rutter.

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