Denver Broncos linebacker Alex Singleton is opening up on his recent testicular cancer diagnosis, which he received by way of a random mandatory NFL drug test. "I'm happy I've had this positive outlook through it, because it has been so fast," said Singleton, reflecting on the diagnosis in an exclusive interview with "Good Morning America's" Trevor Ault airing Tuesday. Singleton, a team captain for the Denver Broncos , was diagnosed with testicular cancer following an NFL-mandated drug test earlier this season. After the Broncos took on the Dallas Cowboys on Oct. 26, Singleton said he found an envelope in his locker, indicating he had failed the drug test. "All I see is what the hormone was," he said, remembering reading the letter that delivered the news. Upon researching the detected hor

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