Sport in the Dominican Republic and the championship game that year brought in over $7,000 and commercial pressures led to the sport becoming a semi-profession in the Dominican Republic. Rafael Trujillo became president of the Dominican Republic in 1930 and he helped baseball soar in popularity as the sport gained a political connection. By the end of the 1930s, many of the finest Negro League players from the United States and Cuban players played baseball in the summer in the Dominican Republic as they were paid a fortune in order to come play. Jackie Robinson broke the color barrier in Major League Baseball in 1947
National Tennis League National Tennis League National Tennis Leagues (NTL) was a tour for professional male tennis players established in 1967 by George MacCall. In 1970 it was sold to the World Championship Tennis (WCT), a competing professional tennis league run by Lamar Hunt. The National Tennis League (NTL) was formed by former U.S. Davis Cup captain George MacCall in 1967, as a governing body to a US Professional tennis tour. It was key in moving tennis from a mostly amateur sport to a professional sport. In 1968 Billie Jean King became the first woman of the Open Era to sign a pro