Evaluating the Chase Utley Rule: The Association Between a Rule Change and Collision-Related Injuries in Major League Baseball

BACKGROUND: Major League Baseball (MLB) adopted a rule change in 2016 to reduce the number of collisions that occur when a player slides into a base. The effect of rule 6.01(j) has not been quantified, and it remains unknown if this rule change has led to improved player safety. HYPOTHESIS: Rule 6.0...

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Detalles Bibliográficos
Autores principales: Tanenbaum, Joseph E., Knapik, Derrick M., Karns, Michael R., Salata, Michael J., Gillespie, Robert J., Voos, James E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9087261/
https://www.ncbi.nlm.nih.gov/pubmed/35558142
http://dx.doi.org/10.1177/23259671221090899
Descripción
Sumario:BACKGROUND: Major League Baseball (MLB) adopted a rule change in 2016 to reduce the number of collisions that occur when a player slides into a base. The effect of rule 6.01(j) has not been quantified, and it remains unknown if this rule change has led to improved player safety. HYPOTHESIS: Rule 6.01(j) would be associated with a reduction in the number of collision-related injuries at second base. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Using data from the MLB Health and Injury Tracking System, we quantified the number of collision-related injuries for defensive (ie, fielding) players in the infield at the major and minor league levels between the 2010 and 2019 seasons. We compared the median number of collision-related injuries for defensive players in the infield from before (2010-2015) to after (2016-2019) the implementation of rule 6.01(j) and also calculated the difference in location of the median from the seasons before versus after the rule change. An additional 3 analyses were performed to support or contradict a conclusion that any observed reduction in injuries at the start of the 2016 season was likely caused by the adoption of rule 6.01(j). RESULTS: The median number of collision-related injuries for defensive players at second base decreased from 58.5 to 37.5 injuries per season after the rule change, which was a 36% decrease (difference in location, 19.5 [95% CI, 5.0 to 31.0]; P = .019). In contrast, the median number of collision-related injuries at first base decreased by only 14.1%, from 49.5 before to 42.5 after the rule change (difference in location, –9.0 [95% CI, –4.0 to 18.0]; P = .16), and the median number of collision-related injuries per season at third base was unchanged at 15 per season. CONCLUSION: This rule change was associated with a decrease in the number of collision-related injuries, with the largest effect observed at second base, as expected.

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