UCL Repair and Reconstruction (Tommy John Surgery)
The ulnar collateral ligament — commonly known as the UCL — is the primary stabilizing structure on the inner side of the elbow, and it is essential for generating the force and control required during overhead throwing. When the UCL is torn or stretched beyond its ability to heal, athletes and active patients experience pain on the inner elbow, a loss of throwing velocity and accuracy, a sensation of instability or giving way in the joint, and in many cases an inability to continue participating in their sport. UCL injuries are most commonly associated with baseball pitchers, but they also affect javelin throwers, football quarterbacks, tennis players, gymnasts, and anyone who performs repetitive high-force elbow movements. UCL repair and reconstruction — widely known as Tommy John surgery — remains one of the most effective and well-studied procedures in sports medicine for restoring full elbow stability and returning athletes to competition.
Dr. Jonathan Glashow is a board-certified orthopedic surgeon and Clinical Associate Professor of Orthopedic Surgery at NYU Grossman School of Medicine, with over 30 years of specialized experience in elbow ligament surgery and sports medicine. Fellowship-trained at the Southern California Orthopedic Institute/UCLA and a member of both the NBA Physician’s Society and the NHL Physician’s Society, he has managed UCL injuries at the highest levels of professional sport as Chief Medical Officer for the New Jersey Devils and Philadelphia 76ers — and as a consultant for the LA Clippers and Crystal Palace F.C. An early adopter of advanced techniques including internal brace augmentation for UCL repair, Dr. Glashow offers patients the full spectrum of treatment options — from conservative rehabilitation to traditional Tommy John reconstruction to newer repair techniques — at his Upper East Side practice in New York City. He has been named a Castle Connolly Top Doctor every year since 2000.
Symptoms and Causes of UCL Tears
UCL injuries develop most frequently through repetitive microtrauma rather than a single traumatic event. The throwing motion — particularly the late cocking and acceleration phases — places extreme valgus stress on the inner elbow, and over time this repeated force can weaken, stretch, and ultimately tear the ligament fibers. In some cases, athletes feel a sudden pop on the inner side of the elbow during a throw, followed by immediate pain and an inability to continue. More often, symptoms build gradually over weeks or months. Common signs of a UCL tear include:
- Pain along the inner side of the elbow during or after throwing
- Decreased throwing velocity, accuracy, or endurance
- A sensation of looseness or instability in the elbow
- Numbness or tingling in the ring and pinky fingers
- Swelling along the inner elbow
- Inability to throw at full effort without pain
While baseball pitchers are the most commonly affected population, UCL injuries are increasingly seen in softball players, football quarterbacks, volleyball players, and recreational athletes who participate in overhead sports without adequate conditioning or rest.
Treatment Options for UCL Injuries
Not every UCL tear requires surgery. Dr. Glashow evaluates each patient individually — using physical examination, stress testing, X-rays, and MRI — to determine the grade and location of the tear and whether the ligament has the potential to heal with non-operative management. For partial tears in patients who do not require a return to high-level throwing, a structured rehabilitation program involving rest, physical therapy, and progressive strengthening may restore adequate function and stability.
For athletes who need to return to competitive throwing or for patients with complete UCL tears that have not responded to conservative care, surgical intervention is the most reliable path to restoring full elbow stability. Dr. Glashow offers two primary surgical approaches depending on the nature of the tear and the quality of the remaining ligament tissue.
What Is Tommy John Surgery?
Tommy John surgery — named after the first Major League Baseball pitcher to successfully undergo the procedure and return to professional competition — is a UCL reconstruction in which the damaged ligament is replaced with a tendon graft. Dr. Glashow typically harvests the graft from the patient’s own palmaris longus tendon in the forearm or, when necessary, from the hamstring or a donor source. The graft is threaded through precisely drilled tunnels in the humerus and ulna and secured to recreate the anatomical path, length, and tension of the original UCL. The procedure is performed on an outpatient basis and has a well-established track record of returning athletes to their pre-injury level of competition.
UCL Repair with Internal Brace Augmentation
For certain patients — particularly those with acute, well-defined tears where the ligament tissue remains healthy — Dr. Glashow may recommend a UCL repair with internal brace augmentation rather than a full reconstruction. This newer technique preserves the patient’s native ligament by reattaching it to the bone and reinforcing it with a high-strength suture tape that protects the repair during healing. The primary advantage of this approach is a significantly shorter recovery timeline — often allowing a return to throwing within four to six months compared to the twelve-to-eighteen-month timeline associated with traditional Tommy John reconstruction. Dr. Glashow determines which approach is appropriate based on the timing of the injury, the condition of the remaining ligament, and the patient’s competitive demands.
“The decision between UCL repair and full reconstruction depends entirely on what the ligament looks like and what the athlete needs to get back to,” says Dr. Glashow. “When the tissue quality is right, internal brace repair can cut the recovery timeline nearly in half — but when reconstruction is the better option, there is no substitute for doing it correctly the first time.”
What to Expect During Recovery
Recovery from UCL surgery follows a carefully structured, phased rehabilitation protocol that Dr. Glashow coordinates closely with physical therapists, athletic trainers, and coaches. For traditional Tommy John reconstruction, patients typically wear a brace for the first several weeks while the graft incorporates into the bone tunnels. Gentle range-of-motion exercises begin within the first one to two weeks, with progressive strengthening introduced over the following months. A formal return-to-throwing program — beginning with light tossing and gradually advancing to full-effort competition — typically starts around four to six months post-surgery, with most athletes returning to competitive play between twelve and eighteen months after the procedure.
For UCL repair with internal brace augmentation, the rehabilitation timeline is accelerated. Many patients begin their return-to-throwing program within three to four months, with a return to competition in as few as six months. Dr. Glashow tailors the rehabilitation pace to each patient’s healing response, sport-specific demands, and competitive timeline.
Schedule a UCL Evaluation in New York City
Whether you are a competitive throwing athlete experiencing inner elbow pain, a weekend warrior who felt a pop during a game, or a patient seeking a second opinion on a UCL diagnosis, Dr. Glashow and his orthopedic team can provide an accurate assessment and a clear path forward. With same-day imaging, same-day and next-day appointments, and the full range of treatment options — from conservative rehabilitation to internal brace repair to traditional Tommy John reconstruction — his Upper East Side practice offers the kind of comprehensive, athlete-caliber care that has made it one of the most trusted orthopedic practices in New York City. Contact our office to schedule your consultation.
Frequently Asked Questions About UCL Reconstruction and Tommy John Surgery
How do I know if I tore my UCL?
The most common signs include sudden or progressive pain on the inner side of the elbow during throwing, a noticeable drop in throwing velocity or control, a pop sensation at the time of injury, swelling along the inner elbow, and tingling in the ring and pinky fingers. Dr. Glashow uses a combination of physical examination, valgus stress testing, X-rays, and MRI to confirm the diagnosis, determine the grade of the tear, and assess whether the ligament is a candidate for repair or requires full reconstruction.
Can a torn UCL heal without surgery?
Partial tears in patients who do not need to return to high-level overhead throwing can sometimes be managed with rest, physical therapy, and progressive strengthening. However, complete tears and partial tears in competitive throwing athletes rarely heal to a level that restores full throwing capacity without surgical intervention. Dr. Glashow evaluates each case individually and will always pursue conservative treatment first when the injury pattern and the patient’s goals support that approach.
What is the difference between UCL repair and UCL reconstruction?
UCL reconstruction — Tommy John surgery — replaces the torn ligament entirely with a tendon graft from another part of the body. UCL repair preserves the patient’s native ligament by reattaching it to the bone and reinforcing it with an internal brace. Repair is a newer option that offers a faster recovery but is only appropriate when the tear is acute, well-defined, and the remaining tissue is healthy enough to hold the repair. Dr. Glashow determines which approach will provide the most durable, reliable result for each patient based on imaging, intraoperative findings, and the athlete’s return-to-play requirements.
How long is recovery after Tommy John surgery?
Traditional Tommy John reconstruction follows a phased rehabilitation protocol that typically spans twelve to eighteen months. Patients begin range-of-motion exercises within the first two weeks, start strengthening around six to eight weeks, and enter a formal return-to-throwing program between four and six months post-surgery. Full clearance for competitive throwing generally occurs between twelve and eighteen months. UCL repair with internal brace augmentation can shorten this timeline significantly, with some athletes returning to competition in as few as six months.
What is the success rate of Tommy John surgery?
Tommy John surgery has a well-established track record, with published success rates for return to the same or higher level of competition ranging from approximately 80 to 90 percent in overhead throwing athletes. Outcomes depend on several factors including the quality of the graft, the precision of the surgical technique, adherence to the rehabilitation protocol, and the athlete’s overall conditioning. Dr. Glashow’s experience performing UCL procedures on professional athletes — where the margin for error is smallest — reflects the level of technical precision he brings to every case.
Can Tommy John surgery be performed on non-athletes?
Absolutely. While Tommy John surgery is most commonly associated with baseball pitchers, the procedure is performed on patients from all backgrounds who have sustained a UCL tear — including recreational athletes, manual laborers, and individuals whose daily activities require reliable elbow stability and grip strength. The surgical technique and rehabilitation principles are the same regardless of the patient’s competitive level, and Dr. Glashow tailors the recovery timeline to each individual’s functional goals.
