This narrative review covers UCL injuries of the elbow in throwing athletes. It walks through anatomy, throwing biomechanics, diagnosis, and treatment. It compares the major reconstruction techniques and expected return-to-play outcomes.
The core mental model here is a load mismatch: throwing produces valgus torque over 60 Nm, but the native anterior bundle fails at 15 to 35 Nm. That gap explains both acute ruptures and the slow attrition seen in chronic insufficiency, and it explains why a fatigued flexor-pronator mass raises injury risk.
For diagnosis, do not rely on the exam alone since only 26% to 83% of physicians detect valgus laxity clinically. MRI is required, and the T-sign on arthrogram is 100% specific when present. For management, sprains and partial tears get at least 3 months of nonoperative care, while complete tears in competitive throwers go to reconstruction.
The practical teaching point is that modified Jobe and Docking dominate because they cut the ulnar nerve complication rate seen in the original Jobe technique, and no single technique is clearly superior on return to play.
This narrative review covers UCL injuries of the elbow in throwing athletes. It walks through anatomy, throwing biomechanics, diagnosis, and treatment. It compares the major reconstruction techniques and expected return-to-play outcomes.
The core mental model here is a load mismatch: throwing produces valgus torque over 60 Nm, but the native anterior bundle fails at 15 to 35 Nm. That gap explains both acute ruptures and the slow attrition seen in chronic insufficiency, and it explains why a fatigued flexor-pronator mass raises injury risk.
For diagnosis, do not rely on the exam alone since only 26% to 83% of physicians detect valgus laxity clinically. MRI is required, and the T-sign on arthrogram is 100% specific when present. For management, sprains and partial tears get at least 3 months of nonoperative care, while complete tears in competitive throwers go to reconstruction.
The practical teaching point is that modified Jobe and Docking dominate because they cut the ulnar nerve complication rate seen in the original Jobe technique, and no single technique is clearly superior on return to play.