FILE - Michael Johnson, of the United States, celebrates after he won the men's 200-meter final in a world record time of 19.32 at the 1996 Summer Olympic Games in Atlanta, Aug. 1, 1996. Sprinting great Michael Johnson is launching a track league that looks to assemble nearly 100 of the sport's top performers four times a year to compete for $12.6 million in prize money over its first season. The league, Grand Slam Track, announced Tuesday, June 18, 2024, that it will launch next April with plans for one event in Los Angeles, the home of the 2028 Olympics, one in another American city and two more overseas. (AP Photo/Doug Mills, File)