MLB announces modernization of Minor League system - World Baseball Softball Confederation
MLB clubs will have four affiliates for a total of 120 Minor League teams, all holding a Professional Development League (PDL) license.
World Baseball Softball Confederation
Press release: MLB announces new modernized Player Development
MLB, Atlantic League will experiment new rule changes - World
World Baseball Softball Confederation
WBSC boosts Baseball5™ global expansion through seminars in Asia
World Baseball Softball Confederation
World Baseball Softball Confederation
Various rule changes to be tested in Minor League Baseball - World
MLB rule changes 2021: Shift restrictions, pitch clock, extra