Skip to content
Elbow

UCL Reconstruction: Tommy John surgery, modern technique.

The ulnar collateral ligament (UCL) of the elbow is the throwing athlete's most vulnerable structure. Reconstruction uses anchors Dr. Lee helped design, combined with internal brace augmentation in selected cases.

Written bySteven J. Lee, MD · Double Fellowship-Trained · Hand & Sports Medicine
Last reviewed · May 2026

The ulnar collateral ligament, the UCL, sits on the inside of the elbow and resists the enormous valgus stress generated by throwing. When it tears, throwing velocity drops, accuracy fails, and continued play risks larger injuries to the ulnar nerve and surrounding structures.

Tommy John surgery, named for the pitcher who underwent the first successful procedure in 1974, has evolved enormously over the past five decades. Modern techniques use stronger fixation, allow faster rehab, and now include internal brace augmentation for selected patients. The fundamental goal remains the same: a reconstructed elbow that can return to throwing at the same level as before.

How UCL injuries happen

Most UCL tears occur in overhead throwing athletes, baseball pitchers most famously, but also football quarterbacks, javelin throwers, and high-level tennis players. The injury can be acute (a sudden pop during a throw) or chronic (progressive medial elbow pain over a season of throwing).

The injury typically begins as partial tearing that worsens with continued throwing. Many athletes describe a drop in velocity, loss of control, or pain late in games before the ligament fails completely.

How UCL injuries are diagnosed

MRI is the standard imaging study for suspected UCL injury. MR arthrogram (MRI with contrast injected into the joint) improves sensitivity for partial tears. The clinical exam, including the moving valgus stress test and milking maneuver are highly suggestive in experienced hands. When there is doubt, elbow arthroscopy is the gold standard for diagnosis.

Dr. Lee's approach

Not every UCL injury requires surgery. Partial tears in non-throwers can be managed conservatively. Even some partial tears in throwers respond to a period of rest, structured rehab, and biologic injection (PRP). The decision to operate is based on the tear pattern, the patient's sport and level, and how the elbow responds to non-surgical treatment.

When reconstruction is the right call, Dr. Lee uses the modern internal brace technique augmentation, using anchors he helped design. The internal brace allows for more confident early rehab and, in selected athletes, a shorter timeline to return to throwing.

Non-surgical treatment

Selected partial tears, particularly in athletes not committed to high-level throwing, can be managed with 6–12 weeks of throwing rest, structured rehab focused on hip/core/scapular mechanics, and in some cases PRP injection. A period of supervised return-to-throwing follows. Success depends on tear location, partial vs. complete, and the athlete's demands.

UCL repair vs reconstruction

When reconstruction is needed, a tendon graft, typically the patient's own palmaris longus or gracilis, is routed through bone tunnels to recreate the UCL. The construct is secured with the anchor system Dr. Lee co-designed. In selected patients, an internal brace tape is added to the construct, allowing for earlier confident rehab and, in some cases, a faster return to throwing.

Recovery timeline

Recovery for a thrower is a months-long structured progression:

  1. Weeks 0–2
    Posterior splint, then hinged brace. No elbow motion in the first 1–2 weeks to protect the graft. Begin hand and shoulder motion immediately.
  2. Weeks 2–6
    Hinged brace with progressive range of motion. Initiate light strengthening for shoulder, scapula, and core. No valgus stress.
  3. Months 2–4
    Brace off. Full range of motion. Progressive strengthening. No throwing yet.
  4. Months 4–9
    Begin interval throwing program at month 4–5. Progress through long-toss, mound work, and competitive throwing under guided protocol. Return to competitive pitching typically at 12–15 months, sometimes faster with internal brace augmentation.

What patients commonly misunderstand

What patients (and parents) often misunderstand:

  • Tommy John surgery does not throw harder. There is a persistent myth that UCL reconstruction improves velocity. It does not. The goal is to return to the same level as before, not to exceed it. Velocity recovery is a function of rehab, mechanics, and conditioning.
  • The graft is not the whole story. Outcomes depend as much on rehabilitation and throwing mechanics as on the surgery itself. Throwers returning to the same flawed mechanics that injured the first UCL are at risk for re-injury.
  • Not every UCL injury is a 12+ month story. Some partial tears can return to play in months without surgery. The internal brace augmentation, when appropriate, can shorten the post-surgical return to throwing in some athletes. Each case is individual.

This page is general educational content authored by Dr. Lee. It is not a substitute for individual medical advice. Every patient's case is different, book a consultation to discuss yours.

Patient questions

Tommy John surgery, answered.

  • Do I need Tommy John surgery, or can my UCL heal on its own?

    It depends on the tear. Partial tears in athletes who aren't committed to high-level throwing often improve with rest and rehab, sometimes with PRP. Complete tears in throwers usually require reconstruction to return to competitive throwing. The decision is individualized, Dr. Lee discusses both paths honestly and won't push surgery on an injury that doesn't require it.

  • What is the internal brace, and do I need it?

    The internal brace is a synthetic tape, anchored into bone, that augments the tendon graft used in UCL reconstruction. In selected patients with good ligament tissue, the internal brace allows for a stronger repair and thus more confident early rehab and, in some cases, a faster return to throwing. Dr. Lee discusses whether it makes sense in your case.

  • How long until I can pitch again?

    Traditional UCL reconstruction returns competitive pitching at 12–15 months. Lighter throwing begins around month 4–5. With internal brace augmentation in appropriate patients, that timeline can be shorter, even 6-8 months, though the underlying biology of graft maturation still requires patience. Returning too early is the single most common cause of re-injury.

  • Will I throw as hard as before?

    Most successfully-rehabilitated athletes return to their previous level of throwing. Tommy John surgery does not, as the myth has it, increase velocity above the patient's natural ceiling. What it does is restore the elbow's ability to withstand throwing, which often allows athletes who had been pitching through pain to return to their full mechanical potential.

  • Can I get a second opinion if I've already been told I need surgery?

    Yes, and many patients do. Dr. Lee sees UCL second opinions regularly, both for patients told they need surgery and for patients told they don't. If you have an MRI, sending it ahead lets the visit be substantive.

Next step

UCL injury or unexplained throwing arm pain? Get the right diagnosis first.

Throwing arm pain is rarely just 'soreness.' The athletes who do best are the ones who get an accurate diagnosis early, before continued throwing turns a partial tear into a complete one.