Are defensive and offensive positions similar or different ?
The defensive backs , in turn , generally are classified into several different specialized positions : Safety : * Free Safety - most often the deepest safety * Strong Safety - the bigger more physical safety , much like a small , quicker linebacker Defensive halfback ( Canadian football only ) Cornerback - which include : * nickel back - the fifth defensive back in some sets , like the Nickel formation * dime back - the sixth defensive back in some sets , like the Dime formation * The seventh defensive back , in the exceedingly rare ' quarter ' set ** known as a dollar back or a quarter back ( not to be confused with the offensive player who throws the ball ) The group of defensive backs is known collectively as the secondary .