Fernando Tatis Jr.'s father says his son's positive PED test all happened because of a haircut that went very, very wrong for the MLB superstar.
Fernando Tatis Sr. explained the situation to MLB insider Héctor Gómez on Monday -- saying after the Padres outfielder got a chop recently ... he developed a fungus on his skin.
Tatis Sr. said his 23-year-old son turned to a medication to fix the issue -- but one of the ingredients in the remedy just so happened to trigger a positive test.