Tommy John Surgery (UCL Reconstruction): Procedure, Risks, and Recovery Timeline
Updated: 6 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026 · How we review
Quick Answer: What is Tommy John surgery?
Tommy John surgery is a reconstruction of the ulnar collateral ligament (UCL), the ligament on the inside of the elbow that helps you throw. A surgeon rebuilds the damaged ligament with a tendon graft or, in some cases, an internal brace. Full recovery usually takes about a year or more, and most athletes return to play. [1]
What the research says
Most throwers get back to their previous level. A meta-analysis of 15 studies (1,156 athletes, average age 20.7) found 85.7% returned to competition at or above their pre-injury level, at an average of 12.2 months after surgery. A return-to-throwing program usually started around 16.7 weeks after the operation. (Anderson et al., Am J Sports Med, 2022) [2]
Repair and reconstruction both work well, with low failure rates. Pooling 31 studies (2,277 reconstruction and 496 repair patients), 88.7% of reconstruction patients and 91.1% of repair patients returned to sport. Graft failure was about 1.2% after reconstruction and 1.0% after repair; ulnar nerve irritation occurred in 5.1% and 0.9%. (Dave et al., JSES Rev Rep Tech, 2025) [3]
Pain is the main reason some athletes don't return. Across 26 studies of 1,019 athletes, 11.4% did not return to sport after UCL surgery. Persistent elbow pain was the most common reason, cited in 28.2% of those cases. (Fathi et al., Orthop J Sports Med, 2022) [4]
Key takeaways
Tommy John surgery rebuilds a torn or overused UCL on the inner elbow. [1]
It is mainly for competitive and professional overhead throwers; recreational players often recover with rest and conservative care. [1]
The operation takes 60 to 90 minutes under general anesthesia, and most people go home the same day. [1]
Recovery runs through a hard splint, a hinged splint, light throwing at 3–4 months, limited practice at 6–9 months, and full return at 12–18 months. [1]
Throwing too early can lead to more surgery and more time off. [1]
Tommy John surgery at a glance
Feature | Details |
Other names | UCL surgery, UCL reconstruction |
What it fixes | Injured or torn ulnar collateral ligament on the inside of the elbow |
Typical patient | Competitive or professional overhead-throwing athlete |
Anesthesia | General (you are asleep) |
Operation time | 60–90 minutes |
Hospital stay | Usually home the same day |
Graft length | 6–7 inches of tendon, if a graft is used |
Return to light throwing | Around 3–4 months, only with surgeon clearance |
Full return to competition | Often 12–18 months |
Return-to-play rate | 80%–95% of baseball players, without long-term complications |
Source: [1]
What is the ulnar collateral ligament (UCL)?
The ulnar collateral ligament is a strong band of tissue on the inside of the elbow that keeps the joint stable when you throw. [1]
It connects the upper arm bone (humerus) to one of the forearm bones (ulna). UCL injuries happen when the elbow is overused for the same motion again and again, especially throwing. [1]
These injuries mostly affect athletes who throw overhead a lot, including those who play:
Baseball
Softball
Javelin
Football
Tennis and other racket sports
To learn the symptoms, grades, and non-surgical options for the injury itself, see our guide to UCL injury (Tommy John injury).
Who needs Tommy John surgery?
Tommy John surgery is usually needed by competitive or professional athletes who throw constantly and want to protect their careers. [1]
If you play these sports for fun, a UCL injury can often heal with rest and conservative treatment, such as physical therapy. Surgery becomes the stronger option when the elbow has to handle high-level, repeated throwing. [1]
Type of athlete | Usual approach |
Recreational player | Rest and conservative treatment often enough |
Competitive or professional thrower | UCL reconstruction may be needed to preserve the career |
Source: [1]
Medial elbow pain has other causes too. Golfer's elbow affects the forearm tendons on the same side, and cubital tunnel syndrome involves the nerve that runs behind the inner elbow, so a proper exam matters.
Why is it called Tommy John surgery?
Tommy John surgery is named after Tommy John, a Major League Baseball pitcher who tore his ulnar collateral ligament and had the reconstruction in 1974. [1]
He sat out the 1975 season, then went back to pitching professionally. Because his operation was such a success, people began calling UCL reconstruction "Tommy John surgery." [1]
How do you prepare for Tommy John surgery?
Preparing for Tommy John surgery means a set of health checks ordered by your orthopedic surgeon to confirm you are fit for the operation. [1]
Check | Why it is done |
Physical exam | Confirms you are healthy enough for surgery |
Blood tests | Screens your general health before anesthesia |
X-ray, CT scan, or MRI | Takes detailed pictures of the elbow |
Electrocardiogram (ECG) | Checks your heart health |
Dental exam | Lowers the risk of infection after surgery |
Source: [1]
A few more steps before the day:
Medicines and supplements: Tell your surgeon about everything you take, including over-the-counter supplements. You may need to stop some of them. [1]
Fasting: Most people stop eating and drinking about 12 hours before the operation. Your surgeon will give you the exact time. [1]
A ride home: You will need someone to drive you home afterward, so arrange it ahead of time. [1]
What happens during Tommy John surgery?
During Tommy John surgery, the surgeon removes damaged tissue and anchors a new tendon (or an internal brace) between the ulna and humerus so it works like a new UCL. [1]
An anesthesiologist first gives you general anesthesia, so you sleep through the procedure and feel no pain. [1] The operation usually follows these steps:
Looking inside the joint. The surgeon may use arthroscopy (a small camera) to find and treat other injuries. [1]
Harvesting the graft. If a graft is needed, 6 to 7 inches of tendon is taken, usually from the forearm and sometimes from the back of the knee near the hamstring. A donor tendon may be used if yours won't work. [1]
Clearing damaged tissue from inside the elbow. [1]
Drilling bone tunnels. Two holes go in the ulna and three holes, in a Y-shaped pattern, go in the humerus. [1]
Placing the new ligament. The tendon is threaded through the tunnels and may be looped around itself or anchored with screws. Or the internal brace is inserted instead. [1]
Fixing other problems, such as ulnar nerve damage. [1]
Closing the incisions with stitches and a clean dressing. [1]
Splinting the arm in a hard splint so the elbow can't move. [1]
Graft reconstruction vs. internal brace
Tendon graft reconstruction | Internal brace | |
What it uses | A healthy tendon from your forearm or knee area, or a donor tendon | An implanted device that reinforces the ligament |
When it's used | When the ligament needs full reconstruction | When full reconstruction isn't needed |
Goal | A stable elbow, less pain, restored motion | A stable elbow without a graft |
Source: [1]
How long does Tommy John surgery take?
Tommy John surgery usually takes 60 to 90 minutes. [1]
The time depends on how damaged the ligament is and whether other injuries need treatment at the same time. After surgery, your care team watches you in a recovery area while the anesthesia wears off, and most people go home the same day. [1]
What are the benefits and risks of Tommy John surgery?
The main benefit of Tommy John surgery is a stable elbow that lets most athletes return to their sport, with 80% to 95% of baseball players returning without long-term complications. [1]
Benefits | Risks |
Most people can resume their sports | Infection at the surgery site |
A more stable elbow with less pain and restored range of motion | Tingling or numbness from the ulnar nerve |
Possible improvement in throwing endurance | Damage to blood vessels |
Low chance of needing more surgery on the same UCL | The new tendon loosening or wearing down |
Source: [1]
Improved endurance is a side effect, not a reason to have the operation. Surgery should not be done just to throw longer. [1]
How long is Tommy John surgery recovery?
Tommy John surgery recovery usually takes a year or longer, and returning to full competition can take 12 to 18 months. [1]
Your surgeon will set your exact plan. A typical timeline looks like this:
Phase | Approximate timing | What happens |
Hard splint | First few weeks | The elbow is kept still to protect the new ligament |
Hinged splint | After 1–2 months | Limited, controlled movement and physical therapy; the hinge locks between exercises |
Light throwing | 3–4 months | Gradual return to your sport or training, only with surgeon approval |
Limited practice | 6–9 months | Practice resumes, sometimes with modified training |
Full return to play | 12–18 months | Clearance for games and competition if there are no setbacks |
Source: [1]
The hardest part for many athletes is patience. Throwing, working out, or loading the elbow more than your surgeon allows can damage the new ligament. Going back too soon may mean more surgery and even more time away. [1]
What affects return to play after Tommy John surgery?
Return to play after Tommy John surgery depends on age, how well the body responds to rehab, the level of play before the injury, and the sport or type of throwing. [1]
When should you call a doctor after Tommy John surgery?
After Tommy John surgery, see a healthcare provider right away if you notice any of these warning signs: [1]
Chest pain
Shortness of breath
Fever higher than 102°F (39°C)
Bleeding
Signs of infection at the incision: leaking, swelling, discoloration, odor, or warmth
New or worsening pain in the elbow, arm, or hand
Severe pain that doesn't improve with pain medicine
Chest pain or trouble breathing needs emergency care immediately.
Conclusion
A UCL tear used to end many throwing careers. Today, Tommy John surgery rebuilds the ligament with a tendon graft or an internal brace, and most athletes get back on the field. [1]
The trade-off is time. Expect a staged recovery of a year or more, and treat your surgeon's clearance as the only green light to throw. Patience during rehab protects the new ligament and your career.
Next step: If you have inner-elbow pain from throwing, start with our UCL injury guide to understand the injury, then book an exam with an orthopedic or sports medicine specialist. Bookmark this page to follow the recovery timeline, and share it with a teammate, parent, or coach facing the same decision.
FAQ
What is Tommy John surgery?
Tommy John surgery is a reconstruction of the ulnar collateral ligament (UCL) on the inside of the elbow. The surgeon uses a tendon graft or an internal brace to restore a stable elbow for throwing.
Who needs Tommy John surgery?
Tommy John surgery is mostly for competitive or professional athletes who throw overhead often, such as baseball pitchers. Recreational players can often recover from a UCL injury with rest and conservative treatment.
How long does Tommy John surgery take?
Tommy John surgery usually takes 60 to 90 minutes under general anesthesia. Most people go home the same day but need someone to drive them.
How long is recovery from Tommy John surgery?
Recovery from Tommy John surgery usually takes a year or longer. Light throwing may start at 3 to 4 months, limited practice at 6 to 9 months, and full competition often at 12 to 18 months.
What is the success rate of Tommy John surgery?
Tommy John surgery is usually very successful, with 80% to 95% of baseball players returning to play without long-term complications. Timing depends on age, rehab response, level of play, and sport.
Where does the graft for Tommy John surgery come from?
The graft for Tommy John surgery is usually a 6- to 7-inch tendon taken from the forearm. Sometimes it comes from the back of the knee near the hamstring, or from a donor.
What are the risks of Tommy John surgery?
The risks of Tommy John surgery include infection, ulnar nerve tingling or numbness, blood vessel damage, and the new tendon loosening or wearing down.
When should I call a doctor after Tommy John surgery?
Call a doctor right away after Tommy John surgery for chest pain, shortness of breath, fever above 102°F (39°C), bleeding, signs of wound infection, or worsening or severe pain.
Does Tommy John surgery make you throw harder?
No. The surgery is meant to restore a damaged ligament, not to boost performance. Any gains after recovery usually come from the long rehab and conditioning program.
Can non-athletes have Tommy John surgery?
Yes. It is most common in throwing athletes, but people who tear the UCL in a fall or other injury may also need it. Many non-athletes do well with rest and physical therapy instead.
Related Reading
Valgus and Varus Stress Tests: Checking Knee and Elbow Ligaments explains the exams used to check the knee and elbow collateral ligaments.
References
Cleveland Clinic. Tommy John Surgery (UCL Surgery): What It Is & Recovery Time. Cleveland Clinic. Last updated June 18, 2025. https://my.clevelandclinic.org/health/treatments/25117-tommy-john-surgery
Anderson MJJ, Crockatt WK, Mueller JD, et al. Return-to-Competition Criteria After Ulnar Collateral Ligament Reconstruction: A Systematic Review and Meta-analysis. Am J Sports Med. 2022;50(4):1157-1165. PMID 34181472. https://doi.org/10.1177/03635465211016839
Dave U, Rubin J, Chang N, et al. Ulnar collateral ligament repair and reconstruction have similar return to sport rates with low complication rates: a systematic review and meta-analysis. JSES Rev Rep Tech. 2025;5(4):948-959. PMID 41179443. https://doi.org/10.1016/j.xrrt.2025.02.005
Fathi A, Haratian A, Treloar J, et al. Pain Is the Most Frequently Cited Reason Athletes Fail to Return to Sport After Ulnar Collateral Ligament Surgery: A Systematic Review and Meta-analysis. Orthop J Sports Med. 2022;10(10):23259671221128257. PMID 36313005. https://doi.org/10.1177/23259671221128257
Further reading (external)
MedlinePlus. Elbow Injuries and Disorders. MedlinePlus. Last updated September 23, 2025. https://medlineplus.gov/elbowinjuriesanddisorders.html
American Academy of Orthopaedic Surgeons. Elbow Injuries in the Throwing Athlete. OrthoInfo. Accessed October 31, 2026. https://www.orthoinfo.org/diseases--conditions/elbow-injuries-in-the-throwing-athlete
Medical disclaimer
This article is for general educational purposes and does not replace professional medical advice, diagnosis, or treatment. Always talk to a qualified healthcare provider about your symptoms and treatment options. If you have chest pain, trouble breathing, or another emergency, seek emergency care right away.
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