Patrick Mahomes’ mother Randi Mahomes opened up on a period during her son’s high school football career, when he almost quit the sport. During an Instagram story Q&A on Friday, Randi Mahomes was asked how she kept her son motivated through “challenging times.” The mother answered by saying she hadn’t had to do much, because the quarterback had been “so determined for himself,” but she also recounted a time when he almost quit football in high school. CHIEFS…