These rules are different than the domestic age determination date for USA Baseball. The World Baseball Softball Confederation (WBSC) and WBSC Americas use the calendar year - January 1 - to differentiate the various age groups for international play. Q: What are the international age determination...
The middle of the century led major league baseball to the West of the United States and also became a time when pitchers dominated. Scoring became so low in the American League, due to pitching dominance, that the designated hitter was introduced; this rule now constitutes the primary differen...