https://www.mlbtraderumors.com/2026/03/mlb-to-test-check-swing-rule-changes-in -triple-a.html 擷取文章一些重點 The most notable is the introduction of the check-swing challenge system in th e Triple-A Pacific Coast League, beginning in early May. That allows a batter, pitcher, or catcher to challenge an umpire’s check-swing decision against ba t-tracking technology. MLB had tested this rule in the Low-A Florida State Lea gue and the Arizona Fall League last year MLB To Test Check-Swing Rule In Triple-A March 16th, 2026 at 11:02pm CST ‧ By Anthony Franco Major League Baseball will implement a handful of rule changes at various leve ls of the minor leagues during the 2026 season. Eric Longenhagen of FanGraphs first reported the slate and those interested in the topic are encouraged to r ead that post in full. The most notable is the introduction of the check-swing challenge system in th e Triple-A Pacific Coast League, beginning in early May. That allows a batter, pitcher, or catcher to challenge an umpire’s check-swing decision against ba t-tracking technology. MLB had tested this rule in the Low-A Florida State Lea gue and the Arizona Fall League last year. Advertisement A check-swing challenge system requires an objective cutoff point. The thresho ld is whether the bat head breaks a 45? angle relative to the handle (essentia lly aligning with the opposite base line). Major League Baseball’s rulebook d oesn’t have an official check-swing cutoff, instead leaving it at the umpire ’s discretion as to whether the hitter offered. As Longenhagen demonstrates with video, the 45? threshold is further along tha n what umpires have generally treated as the cutoff. That led hitters to succe ssfully challenge a lot of calls last year. It appears that’s a deliberate co nsideration by the league. MLB’s memo notes a slight drop in the Florida Stat e League strikeout rate after the check-swing challenge was implemented, “hav ing a positive impact on balls in play and encouraging more extensive testing at higher levels.” It’s not a huge effect but one that would turn more swing ing strikes into balls than vice versa. 今年5月開始會在3A太平洋聯盟PCL測試揮 棒過半挑戰系統，判斷標準是是球棒頭部相 對於握把的角度是否超過45度，會允許打者 投手 捕手挑戰，而國際聯盟IL則是僅提供裁 判判決標準，不提供球隊挑戰。 根據去年在1A測試的結果，45度通常比裁判 判決出棒過半的臨界點靠前，如影片所示， 在引入挑戰系統後1A的聯盟整體三振率有顯 著下滑。 看似過半但實際上不到45度 https://youtu.be/dRw89dkKFRI?si=McLLW4YtFX8duNMN 挑戰影片 https://youtu.be/_kieqgvRWno?si=4cIuIKaulZhMW4LD --

※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 49.216.172.220 (臺灣) ※ 文章網址: https://webptt.com/m.aspx?n=bbs/MLB/M.1773730026.A.B51.html ※ 編輯: tty0102 (49.216.172.220 臺灣), 03/17/2026 14:49:02