Two years ago, the sports card and memorabilia business had a tidy little niche audience. Then a wild gold rush began and continues to this day. An explainer on how we got here -- and what happens next.

Growing and changing any sport isn't new and, at most times, is necessary. But the rumblings of Texas and Oklahoma likely moving to the SEC remind us that the power brokers pulling the strings don't factor in the greater good.

U.S. gymnastics superstar Simone Biles is out of the team finals at the Tokyo Olympics. USA Gymnastics said in a statement that Biles withdrew because of a "medical issue" and will be assessed daily.

U.S. gymnastics superstar Simone Biles is out of the team finals at the Tokyo Olympics because of an apparent injury.

By the end of these Olympics, Ledecky could be one of America's most historic Olympians.

Simone Biles, Sunisa Lee, Grace McCallum and Jordan Chiles go for gold in Tuesday's gymnastics team finals. We've got you covered with live updates here.

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The USWNT claimed second place in Group G to seal progress to the knockout stages of the Olympics, while Australia could also go through as a top third-ranked side.

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The U.S. women's basketball team topped Nigeria, while Lydia Jacoby's gold led the way for Team USA in the pool.