For the last three Major League Baseball (MLB) seasons, the number and rate of home runs (HR) have increased, especially in the seasons' first months (March and April). Analyses of these data have concentrated on the batters, their swings and the baseball itself as potential influencing factors of this surge.But there are many other variables in pitching matchups that can lead to HRs, including the pitchers, pitch type, ballparks and weather.The increase in HRs has been great enough that in 2018, the baseball commissioner's office created a committee to conduct primary and secondary research to identify potential causes But no definitive source was found. The committee concluded that there may be changes in the baseball's aerodynamics, as well as how the baseballs are being stored (in varying degrees of temperature and humidity) that may influence the HR rate.
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