NCAA-Shoe on the floor

[dsavolt]

If player's are supposed to keep their shoes tied, When are they supposed to tie them if they become untied? Since you will not allow time for them to tie them on the court. Would you rather see a sub come in for that player, which will take the same amount of time if you stop and let the player tie his shoe during a dead ball. I don't understand the Logic in not allowing a player to take a few seconds and tie his shoe. This allows you as an official to make conversation with a player. I can't believe that a simple untied shoe is breaking the rules.