Knee Ligament Injuries Beyond ACL: Understanding the Hidden Damage That Affects Stability and Athletic Performance Knee joint injuries extending beyond isolated Anterior Cruciate Ligament (ACL) tears present some of the most intricate mechanical and biological challenges in modern sports medicine. While public awareness predominantly centers on the ACL, the knee relies on a sophisticated network of static stabilizers—including the Medial Collateral Ligament (MCL), Posterior Cruciate Ligament (PCL), and the complex structures of the Posterolateral Corner (PLC)—to maintain multi-directional equilibrium under intense athletic loads. Athletes across the USA, UK, Europe, and Australia frequently encounter disruptions to these structures, often resulting from high-velocity sports collisions, severe hyperextension, or traumatic valgus and varus…