FILE - Sydney McLaughlin-Levrone waves to the crowd after winning the women's 400 meters during the U.S. track and field championships in Eugene, Ore., July 8, 2023. Sydney McLaughlin-Levrone plans on defending her title in the 400-meter hurdles at the Olympics, and has scratched from the 200 and 400-meter flat races that she had originally signed up for. The world-record holder had been entered in all three races for this month's U.S. Olympic trials, but as of Tuesday, June 18, 2024, she was listed as a “scratch” in the 200 and 400. (AP Photo/Ashley Landis, File)
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)
FILE - Former U.S. athlete Michael Johnson, left, and wife Armine Shamiryan arrive at the Laureus Sports Awards ceremony in Madrid, Monday, April 22, 2024. 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, 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/Manu Fernandez, File)