• Optional 2 point conversion after touchdown (the NFL would add this rule in 1994). • Optional 1 inch kicking tee for extra points and field goal attempts. • Clock stop on first downs within the last 2 minutes of the 2nd and 4th quarters. • Intentional and unintentional pass interference. • Six member officiating crew (no side judge). • The USFL game ball was inch (1 cm) shorter than the NFL game ball (both made by
Wilson). • There were no preseason games. ==Expansion cities for 1984==