On Thursday, March 29, rising stars and esteemed superstars alike embark on the journey towards a World Series championship About Major League Baseball: Major League Baseball (MLB) is the most historic professional sports league in the United States and consists of 30 member clubs in the U.S. and Canada, representing the highest level of professional baseball. Led by Commissioner Robert D. Manfred, Jr., MLB currently features record levels of labor peace, competitive balance and industry revenues, as well as the most comprehensive drug-testing program in American professional sports. MLB remains committed to making an impact in the communities of the U.S., Canada and throughout the world, perpetuating the sport’s larger role in society and permeating every facet of baseball’s business, marketing and community relations endeavors. With the continued success of MLB Advanced Media and MLB Network, MLB continues to find innovative ways for its fans to enjoy America’s National Pastime and ...