For most people with osteoarthritis, the cause is unclear. But there are certain factors that are known to increase your risk for osteoarthritis, and one of them is having suffered an injury, from sports or some other trauma. Injuries can occur at any joint, but the knee is particularly susceptible, especially to sports-related injuries. Common knee injuries include tears of the anterior cruciate ligament (ACL) and tears of the meniscus. How these injuries impact risk for osteoarthritis is a bit complicated.