49ers running back Christian McCaffrey was ruled out of Monday Night's game due to an ankle injury, which has now been identified as Achilles tendinitis. This condition can cause ongoing pain and discomfort around the Achilles area, raising concerns about his availability for future games.

• McCaffrey's injury could impact his performance and availability in upcoming games.
• Achilles tendinitis is a condition that can linger, potentially affecting his effectiveness on the field.