NBA Prime Time: Determining the Age When NBA Players Reach Their Peak

Overview

Objectives/Goals The goal of my science project was to determine the age at which NBA players peak. I believed that the average NBA player would peak around the ages of twenty-four and twenty-five. Methods/Materials I used retired NBA players who had a career lasting at least 950 games, starting after 1949 and before they turned twenty-six. I used Player Efficiency Rating, Basketball Win Shares, and Basketball Defensive Win Shares to draw conclusions. I collected the PER, Win Shares, Games Played, Age, and Defensive Win Shares statistics for each player from basketball-reference.com. I separated the players by position into categories, and divided each category into two groups. One group used two-thirds of the players, and the other group used the remaining third. I then sorted their seasons by their age on February 1 of that season, and I calculated the means, medians, and bivariate correlations. Results According to PER, the overall peak was between the ages of twenty-four and thirty-one,. and both Win Shares and Defensive Win Shares stated that they peaked between the ages of twenty-five and twenty-nine. Conclusions/Discussion My hypothesis was incorrect; NBA players peak between the ages of twenty-five and twenty-nine. There was little difference between my two groups. I noticed that centers typically play longer and sometimes peak earlier than guards. I believe they have longer careers because they are harder to replace, and they peak earlier because they are more predisposed to injury. I also noticed something I call the Wave Effect, where players' statistics tend fluctuate in alternate directions for at least three years. The Wave Effect is a very common phenomenon amongst guards. If I were to further this experiment, I would probably expand my analysis and study the Wave Effect more closely.

Competition history

• CSEF 2012 Mathematics & Software · Entry J1417

Resources

• CSEF project summary ↗

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