Blaine Gabbert seems awfully manly to deserve such treatment. According to this CBS Sports article, the prized rookie quarterback is ... a woman, at least on this side of the pond.
Not that there's anything wrong with that, as the "Seinfeld" folks would say.
The AP Stylebook applies blond as a noun to a man with golden locks and as an adjective to any reference to the hair color. Blonde applies as a noun to a woman.
For those not bound by AP style, blonde as an adjective normally applies to female hair. Believe it or not, those across the pond prefer blonde for female and male hair.