ほれ、今季の4シームのスピンレートの推移だ
https://baseballsavant.mlb.com/statcast_search?hfPT=FF%7C&;hfAB=&hfGT=R%7C&hfPR=&hfZ=&stadium=&hfBBL=&hfNewZones=&hfPull=&hfC=&hfSea=2021%7C&hfSit=&player_type=pitcher&hfOuts=&opponent=&pitcher_throws=&batter_stands=&hfSA=&game_date_gt=&game_date_lt=&hfInfield=&team=&position=&hfOutfield=&hfRO=&home_road=&hfFlag=&hfBBT=&pitchers_lookup%5B%5D=660271&metric_1=&hfInn=&min_pitches=0&min_results=0&group_by=name-date&sort_col=spin_rate&player_event_sort=api_p_release_speed&sort_order=desc&min_pas=0&chk_stats_spin_rate=on#results