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San Francisco 49ers running back Jordan Mason is on injured reserve due to an ankle injury he suffered against the Buffalo Bills. Mason, the 49ers’ primary running back, was sidelined with Achilles tendonitis, while star Christian McCaffrey struggled with both injuries. Both players have been on IR since Week 13. The 49ers will turn to rookie Isaac Guerendo to take responsibility in the backfield.

Jordan Mason is on injured reserve with an ankle injury

San Francisco 49ers running back Christian McCaffrey suffered a season-ending knee injury in a loss to the Buffalo Bills. He was placed on the injured list with a PCL sprain and is expected to be out of action for at least six weeks. The same was true for San Francisco backup Jordan Mason, who also suffered an ankle injury. Mason, 25, was a breakout star for the 49ers early in the season. He replaced McCaffrey as the team’s bell cow back and ran for 147 yards and a touchdown in the team’s season-opening win against the New York Jets.

49ers coach Kyle Shanahan confirmed that third-year running back Mason suffered a sprained ankle during San Francisco’s loss to Buffalo in Week 13 and that he is currently on injured reserve due to the injury, which will keep Mason out for at least four games will cost. There are only five games left in the 2024 NFL season, so Mason’s earliest possible return would be Week 18. If the 49ers don’t make the postseason, they could decide not to bring Mason back so he can rest for the 2025 NFL season. as San Francisco is currently 5-7 and last in the NFC West.

^{Mason signed with the San Francisco 49ers as an undrafted free agent in 2022. He was named to the 49ers’ initial 53-man roster after training camp. On December 15, 2022, he capped the game over the Seattle Seahawks with a 56-yard run; It also sealed the 49ers’ victory in the NFC West. He scored his first NFL touchdown in Week 17 against the Las Vegas Raiders. In the 2022 season, Mason had 43 carries for 258 rushing yards and one rushing touchdown in 16 games. He played all 17 games in the 2023 season. Mason ran 40 times for 206 yards and scored three touchdowns.
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McCaffrey and Mason are on IR after Elijah Mitchell was sidelined with a season-ending hamstring injury. The 49ers lost McCaffrey’s replacement and with him Mason. They currently have one healthy running back on the 53-man roster, Isaac Guerendo, and are expected to bring Patrick Taylor Jr. off the practice squad to serve as a replacement for healthy running backs McCaffrey and Mason.}