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49ers’ Backup QB Plan with Mac Jones Looks Legit Despite Blowout Loss to Broncos

SANTA CLARA COUNTY, CALIFORNIA, AUG 10 – Coach Kyle Shanahan confirmed multiple injuries during the preseason loss, with running back Ameer Abdullah listed as questionable after exiting the game with a rib injury.

  • The San Francisco 49ers lost 30-9 to the Denver Broncos in their 2025 preseason opener Saturday night at Levi's Stadium in Santa Clara.
  • With most of their starters out of action for the game, the 49ers added new players to their roster, bringing in Andy Isabella to bolster the receiving corps and Ameer Abdullah to strengthen the backfield; Abdullah was later listed as questionable to continue due to a rib injury.
  • Backup quarterback Mac Jones played three series with a makeshift offensive line, completing 4 of 7 passes for 74 yards, while head coach Shanahan said Jones performed well and is a good quarterback.
  • Running back Estime, 21, had eight carries for 21 yards in the second half, showed growth from last year, and remains fifth in line behind new backfield additions in a challenging path to the roster.
  • Coach Shanahan provided injury updates after the loss, and Broncos coach Payton cited penalties as a concern, reflecting ongoing roster evaluations and development during the preseason.
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49ers’ backup QB plan with Mac Jones looks legit despite blowout loss to Broncos

A year ago it was either Brandon Allen or Joshua Dobbs behind Purdy, and it didn't turn out well for the 49ers.

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49ers Webzone broke the news in on Sunday, August 10, 2025.
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