Byrd told FOXSports that three different doctors told him he has that deficiency. In spring training, Byrd said, he was diagnosed with a tumor on his pituitary gland at the base of his brain, a condition that may have contributed the deficiency.
"I have not taken any hormone apart from a doctor's care and supervision," Byrd told FOXSports. "The Indians, my coaches and MLB have known that I have had a pituitary gland issue for some time and have assisted me in getting blood tests in different states. I am currently working with an endocrinologist and will have another MRI on my head after the season to make sure that the tumor hasn't grown."
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