MLB Rules
🏛️Official — MLB5.5 Baserunning (OBR Rule 5.05–5.09)
Verdict
Per OBR Rule 5.05(a), a batter becomes a baserunner when: A fair ball is hit that is not caught on the fly.; The catcher fails to catch the third strike and first base is unoccupied, or there are two outs (dropped third strike, Rule 5.05(a)(2)).; Four balls (a walk) are called by the umpire, per ...
Source: Rule 5.05, Rule 5.09
Send this to your friend — argument over.
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