Simplify the following text for a Grade 9 native English-speaking person.
Original: The World Baseball Classic is an international baseball tournament sanctioned by the International Baseball Federation ( IBAF ) and created by Major League Baseball ( MLB ) , the Major League Baseball Players Association ( MLBPA ) , and other professional baseball leagues and their players associations around the world .
Simplified: The World Baseball Classic ( WBC ) is an international tournament by Major League Baseball .