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Related Concept Videos

Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

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The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side...
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Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel
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Ulnar Collateral Ligament Reconstruction Does Not Decrease Spin Rate or Performance in Major League Pitchers.

Mark E Cinque1, Christopher M LaPrade1, Geoffrey D Abrams1

  • 1Stanford Department of Orthopaedic Surgery, Stanford University School of Medicine, Redwood City, CA, USA.

The American Journal of Sports Medicine
|May 26, 2022
PubMed
Summary
This summary is machine-generated.

Ulnar collateral ligament reconstruction (UCLR) in MLB pitchers did not significantly decrease fastball or slider spin rate, velocity, or whiff rate upon return to play. Pitchers maintained or improved spin rates post-surgery, indicating successful return to elite performance.

Keywords:
Tommy John procedurebaseballpitchingspin rateulnar collateral ligament reconstruction

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Area of Science:

  • Orthopedic Surgery
  • Sports Medicine
  • Baseball Analytics

Background:

  • Ulnar collateral ligament reconstruction (UCLR) is a common procedure for Major League Baseball (MLB) pitchers.
  • Previous studies show variable effects of UCLR on pitching performance metrics.
  • Spin rate is increasingly recognized as a critical factor in pitch effectiveness, yet its post-UCLR changes are not well-documented.

Purpose of the Study:

  • To evaluate the impact of primary UCLR on the spin rate, velocity, hard-hit rate, and whiff rate of fastballs (FB) and sliders (SL) in MLB pitchers.
  • To test the hypothesis that post-UCLR pitching metrics would decrease, with a corresponding increase in hard-hit rates.

Main Methods:

  • A case series design was used, analyzing data from 36 MLB pitchers who underwent UCLR and returned to play between 2016 and 2019.
  • The Statcast system collected data on spin rate (rpm), velocity (mph), hard-hit rate, and whiff rate for 4-seam FB, 2-seam FB, and SL.
  • Data were compared between the pre-injury season and the first two seasons after return to play (RTP).

Main Results:

  • Of 36 eligible pitchers, 31 (86.1%) returned to MLB play.
  • No significant decreases in spin rate were observed for any fastball or slider type when comparing pre-injury levels to the first and second seasons post-RTP.
  • A significant increase in spin rate was noted for 2-seam fastballs and sliders between the pre-injury and second post-RTP seasons.

Conclusions:

  • MLB pitchers who underwent UCLR and returned to play demonstrated no significant decline in spin rate, velocity, whiff rate, or hard-hit rate for their primary pitches up to two years post-surgery.
  • The findings suggest that UCLR does not negatively impact key performance indicators related to pitch effectiveness, including spin rate.