Dimeback

thumb|right|The dime defense (4 cornerbacks), lined up against 4 wide receivers on offense. A conventional dime formation would have 4 linemen and only one linebacker. In American football, a dimeback is a cornerback or safety who serves as the sixth defensive back (fourth cornerback, third safety; and in some rare cases, a fourth safety) on defense. The third cornerback or safety on defense is known as a nickelback. The dimeback position is essentially relegated to backup cornerbacks and safeties who do not play starting cornerback or safety positions. Dimebacks are usually fast players becau