Josh Gibson became Major League Baseball's career leader with a .372 batting average, surpassing Ty Cobb's .367, when Negro Leagues records for more than 2,300 players were incorporated Tuesday after a three-year research project.

Gibson's .466 average for the 1943 Homestead Grays became the season standard, followed by Charlie "Chino" Smith's .451 for the 1929 New York Lincoln Giants. They overtook the .440 by Hugh Duffy for the National League's Boston team in 1894.

Gibson also became the career leader in slugging percentage (.718) and OPS (1.177), moving ahead of Babe Ruth (.690 and 1.164).

"This initiative is focused on ensuring that future generations of fans have access to the statistics and milestones of all those who made the Negro Leagues possible," baseball commissioner Rob Manfred said in a statement. "Their accomplishments on the field will be a gateway to broader learning about this triumph in American history and the path that led to Jackie Robinson's 1947 Dodger debut."

A special committee on baseball records decided in 1969 to recognize six major leagues dating to 1876: the National (which launched in 1876), the American (1901), the American Association (1882-1891), Union Association (1884), Players' League (1890) and Federal League (1914-1915). It excluded the National Association (1871-75), citing an "erratic schedule and procedures."

MLB announced in December 2020 that it would be "correcting a longtime oversight" by adding the Negro Leagues. John Thorn, MLB's official historian, chaired a 17-person committee that included Negro Leagues experts and statisticians.