🚨 REPORT: SAN FRANCISCO JUST ADDED A FORMER BILLS RUNNING BACK AS THE 49ERS TRY TO PATCH ANOTHER DANGEROUS CRACK IN THEIR BACKFIELD. With injury concerns already creeping back into the room and Christian McCaffrey’s workload always under the microscope, this signing feels less like a small depth move and more like a warning that Kyle Shanahan is preparing for chaos. For 49ers Faithful, every new running back arrival now carries the same painful question — is this insurance, competition, or the first sign of another brutal injury storm? 👇👇👇

Former Bills Running Back Signed By San Francisco 49ers

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ORCHARD PARK, NEW YORK – AUGUST 12: Jordan Mims #35 of the Buffalo Bills is tackled by Segun Olubi #50 of the Indianapolis Colts during the third quarter of a preseason game at Highmark Stadium on August 12, 2023 in Orchard Park, New York. (Photo by Bryan M. Bennett/Getty Images)

The Buffalo Bills‘ own running back situation has virtually not changed at all after leading the league in rushing in 2025.

However, there has been a change for a former Bills tailback – Fresno State alum Jordan Mims, who signed with the franchise out of college as a UDFA in 2023.

Mims, alongside fellow RB Jemar Jefferson has been signed by the San Francisco 49ers on May 28.

49ers signed RBs Jordan Mims and Jermar Jefferson and waived RB Sincere McCormick.

Jordan Mims Signed By the San Francisco 49ers

“49ers signed RBs Jordan Mims and Jermar Jefferson and waived RB Sincere McCormick.” Schefter reported.

Although Mims started his career in New York State, he has been given all of his on-field opportunities by the New Orleans Saints.

The now 26-year old was released by the Bills during final cuts in August 2026, and was subsequently signed to the Saints’ practice squad. Mims remained there for the majority of his first year in New Orleans, although he saw himself promoted to the active roster on a couple of occasions.

The California native saw all of his career production on offense come during the 2024 season, where he played in 11 games and managed 20 rushing attempts and 70 yards on the ground, alongside 12 receptions and 71 yards receiving.

Mims was subsequently cut by the Saints in May 2025 and picked up by the Tennessee Titans that July, although he was released ahead of final cuts on August 2025, and has not been on another team since then.

Do the Bills Need to Bulk Up Their Running Back Room?

The Bills had James Cook make the second-team All-Pro team in 2025 for the first time after a breakout year that saw him put up a league-high 1,621 rushing yards and 291 receiving yards. Cook also managed 14 total touchdowns on offense.

Buffalo also had – as per usual – the dual-threat ability of quarterback Josh Allen adding to their vast rushing totals. Allen produced 579 rushing yards, the fourth most of his career to-date, and generated a further 14 scores on the ground.

However, beyond Cook the position is fairly thin. 2024 fourth round pick Ray Davis has not really proved himself to be a viable full-time back in the unfortunate case that Cook has to miss time. And indeed neither has former Lions seventh round Ty Johnson. The pair combined for less than 500 yards rushing last season as RBs 2 & 3.

So unless the franchise has substantial faith in Frank Gore Jr. or undrafted free agent Desmond Reid, it would be a prudent idea for the Bills to look at bringing – either by trade or free agency – a fresh face at the position.

Daniel Arwas Daniel Arwas is a sports writer who covers the NFL for Heavy.com. Daniel began his career in sports writing in 2022 and has covered the NFL and college football for Gridiron Heroics and The Hammer. More about Daniel Arwas