MLB's placed runner rule in extra innings is now permanent - Bleed Cubbie Blue
Report: MLB keeping controversial extra-innings rule permanently
1888 National League All-Star Team – ONEHOF (One-A-Year Hall of Fame)
Here's a 2020 rule change MLB should keep going forward - Bleed
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Here's a possible compromise on the extra-inning runner on second
Source - Extra-inning, extra-runner rule to remain - ESPN
Bob Costas - Wikipedia
MLB makes extra-inning ghost-runner rule permanent, per sources
Ask Mir About the Cubs
MLB rule changes 2021: Shift restrictions, pitch clock, extra
Gonna miss this duo : r/Dodgers
MLB ghost runner rule: League makes extra-innings change permanent
Extra Innings Rules (& NEW RULES) in Baseball // Baseball Rules
Los Angeles Dodgers – mlbblogger