Prior to Jackie Robinson integrating baseball, the sport was dominated by white athletes. That left African-American ballplayers relegated to the significantly less popular Negro Leagues, leaving them underpaid and underappreciated. Numerous legends (take Josh Gibson, Oscar Charleston, and "Cool Papa" Bell as examples) never got a chance to showcase their skills against the best players in baseball, making it impossible to know how they may have stacked up against Major League Baseball's Hall of Famers of those eras. When Robinson came into the league in 1947, it changed the game forever. Some of the greatest names in baseball history debuted in the Major Leagues after Robinson. Players like Willie Mays, Hank Aaron, Roberto Clemente, Bob Gibson, Barry Bonds, Ken Griffey Jr., and Pedro Martinez are just a handful of the greatest players who ever lived, and Robinson paved the way for all of them.