UCL Injuries in Throwing Athletes: Tommy John vs. Internal Brace Repair

By Dr. Carmen Jansante, PT, DPT, CSCS | Undefeated Physical Therapy and Performance | Pittsburgh

For baseball and softball players in the Pittsburgh area, medial elbow injuries—particularly to the ulnar collateral ligament (UCL)—are becoming increasingly common. Whether you’re a high school pitcher, collegiate athlete, or a profesdion, understanding your surgical and rehabilitation options is critical.

Two of the most common procedures for UCL injuries are traditional Tommy John surgery (reconstruction) and UCL repair with internal brace. While both aim to restore elbow stability, they differ significantly in structure, healing, and return-to-throw timelines.

What is the UCL?

The ulnar collateral ligament (UCL) is the primary stabilizer on the inner aspect of the elbow.

• Connects the ulna to the humerus

• Composed of multiple bundles, with the anterior bundle most involved in throwing

• Resists valgus stress during high-velocity overhead motion

Repetitive throwing—especially pitching—places substantial stress on this ligament, making it particularly vulnerable in overhead athletes.

Surgical Options

Traditional Tommy John Surgery (UCL Reconstruction)

This procedure involves reconstructing the ligament using a tendon graft.

• The damaged UCL is replaced with a tendon (commonly the palmaris longus or hamstring tendon)

• The graft undergoes revascularization and remodeling over time

• Healing depends on the body converting the graft into functional ligament tissue

This approach is typically recommended for chronic tears or cases with poor tissue quality.

UCL Repair with Internal Brace

This is a newer surgical technique that preserves and reinforces the native ligament.

• The existing UCL is repaired rather than replaced

• A collagen-coated fiber tape (“internal brace”) is used to augment the repair

• Provides immediate mechanical stability to the elbow

This option is best suited for acute tears, particularly at the proximal or distal attachment sites where tissue quality remains favorable.

Rehabilitation and Return-to-Throw Timelines

A major difference between these procedures is how quickly an athlete can safely progress.

UCL Reconstruction (Tommy John)

• Plyometrics: approximately 3.5–4 months

• Initiation of throwing: 5–6 months

• Bullpens: 9–10 months

• Return to competition: 12–13 months

UCL Repair with Internal Brace

• Plyometrics: 12–14 weeks

• Initiation of throwing: 14–16 weeks

• Bullpens: approximately 6 months

• Return to competition: 7–8 months

Key Differences

• Tissue: Reconstruction uses a graft; internal brace preserves native ligament

• Early stability: Limited in reconstruction; significantly improved with internal brace

• Healing: Reconstruction relies on graft remodeling; internal brace allows earlier controlled loading

• Timeline: Roughly 9–12+ months vs. 5–8 months for return to play

Clinical Considerations

Not every athlete is a candidate for internal brace repair. Surgical decision-making depends on:

• Tear location and severity

• Tissue quality

• Athlete age and competitive level

From a rehabilitation perspective, both procedures require a structured progression emphasizing:

• Full elbow range of motion

• Shoulder and scapular strength

• Forearm (flexor-pronator) stability

• Gradual, monitored return-to-throw programming

Even with a faster timeline, internal brace patients still require disciplined progression to avoid setbacks.

Final Thoughts for Pittsburgh Athletes

In the Pittsburgh baseball and softball community, we are seeing a clear increase in UCL injuries—along with a growing number of athletes undergoing internal brace procedures.

For the right candidate, internal brace repair can significantly reduce time away from the field. However, long-term success still depends on a well-structured rehabilitation plan and proper throwing progression.

Work With a Throwing Specialist

At Undefeated Physical Therapy and Performance in Pittsburgh, we specialize in helping throwing athletes return safely and effectively to competition following UCL injuries.

Whether you are post-operative or trying to avoid surgery, a targeted plan can make a significant difference in both performance and durability.

References

• Jeffrey R. Dugas et al. Outcomes of UCL Repair With Internal Brace Augmentation in Overhead Athletes.

• James R. Andrews et al. Ulnar Collateral Ligament Reconstruction in Throwing Athletes.

• American Sports Medicine Institute. UCL Injury Research and Treatment Guidelines.

• American Academy of Orthopaedic Surgeons. Elbow UCL Injuries Overview.

• Cain EL, Andrews JR, Dugas JR, et al. Outcomes of UCL Reconstruction in Throwing Athletes.