Jordan Mason, running back for the San Francisco 49ers, is currently dealing with an AC joint sprain in his left shoulder. He was seen wearing a non-contact jersey during practice, indicating he is day-to-day but may have a chance to play against the Chiefs. Prior to his injury, Mason had been performing well, serving as the team's starting running back in the absence of Christian McCaffrey and achieving impressive rushing stats.

• Jordan Mason's injury status is crucial for the 49ers' backfield dynamics.
• Mason has been a strong performer in McCaffrey's absence, making him a valuable fantasy asset.