It looks like Don Jones’ injury was serious, as he posted on his personal Snapchat that he tore his ACL (h/t: Manvir Mundra on Twitter). Jones left Thursday’s final preseason game against the Los Angeles Chargers with an injury, and it looks like he’ll soon be waived/injured by the 49ers before going on injured reserve for the year.
Jones, a defensive back, was left off of most 53-man roster projections, though he was a well-liked special teams player. He joined the 49ers this offseason and was trying to earn a spot on the safety depth chart.