LCB...RCB...there both CBs i dont think that it matters... their are in the NFL and should be able to play both right or left...our #1 CB should be on their #1 Receiver... i blame that on bad coaching... that is like saying their is a difference between playing receiver on the and the left... their are both receivers... it is not like your job changes because you move form the left side of the field to the right side of the field