Kim Singleton swears she knew something was wrong with her son, before anybody truly knew what was wrong with Alex Singleton. She saw something . It was the way he buttoned his pants on that first Sunday of November , she thinks. Or the way he spoke to her, after the Broncos outlasted the Texans in Houston that day.

She’d watched her son play football since Pop Warner, the same happy-go-lucky kid through 31 years of life . She couldn’t place it. But she knew .

“Mother’s intuition,” Kim said.

Perhaps she sensed fear that Sunday, a rare emotion for her son. Worry, at least. Singleton had failed a league-mandated drug test earlier that week, which detected elevated levels of the hormone hCG in his bloodstream. He didn’t know why. He didn’t like not knowing why. But one symptom of eleva

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