Once-beaten heavyweight prospect “Gentleman” Chazz Witherspoon (25-1, 17 KOs), the 2004 National Golden Gloves champion, wants to match his cousin “Terrible” Tim Witherspoon’s major accomplishment as heavyweight champion of the world. Witherspoon, whose only loss in 26 pro fights was last year to world title challenger Chris Arreola. Chazz, battles heavyweight gatekeeper Stacy “Big Foot”…