In the ESPN article they say:
Cushing said he was told after he failed the test that HCG can get in your body by injection or because of tumors.
But we have
The pregnancy hormone human chorionic gonadotropin (hCG) is also present at low concentrations in plasma and urine of men and nonpregnant women.
In men, the concentrations are lower but mostly are measurable by highly sensitive assays. In those 50, it is 2 IU/L (6.1 pmol/L) (17). Concentrations as great as 3-4 IU/L are occasionally observed in healthy men.
I must agree I cannot connect overtraining with a rise in the levels off this particular hormone, however I do not know enough about that topic to dismiss this possibility. On the other hand, the lack of mentioning that hCG is actually normally found in males raises my suspicion of the information coming out about this issue.