資料引用元リンク https://www.mlb.com/news/mlb-2023-rule-changes-pitch-timer-larger-bases-shifts https://www.youtube.com/watch?v=JUDKEJBeX7c https://www.youtube.com/watch?v=8ZNXMJvHPCo https://www.youtube.com/watch?v=urpIkGBIbC8&t=16s https://abcnews.go.com/Sports/