Jordan Mason

49ers placed RB Jordan Mason (ankle) on injured reserve.

Mason and Christian McCaffrey (knee) both landed on injured reserve on Monday, paving the way for Isaac Guerendo to become a league-winner in fantasy leagues. Mason would be eligible to return in Week 18 of the regular season, but if the 49ers don’t activate him, his year would end with a rushing line of 153-789-3. He served as the 49ers’ bell cow back for eight weeks while McCaffrey was out, and was one of the top running backs in fantasy during that two-month stretch. Mason will be a restricted free agent next offseason, but could end up playing for another team in 2025 if the 49ers don’t match any qualifying offers that may come his way. Mason will be 26 at the start of next season and has been a lightly-used back during the first three years of his career.