We play a 5 on 5 flag i9 rules. My QB has issues on locking in on one receiver that we call a play for. If I call a play for 'Y' he locks on that receiver. This QB is good and accurate, but tends to lock. I always preached to him that even though I call a play for 'Y' doesn't mean to go at him. He has to learn to check down on the next and nearest available receiver. Any Ideas. Help is much appreciated.