Center Calling Ten Secs. Using Shot Clock

[firedoc]

I can only speak for NFHS, but this would be a no-no. An official should not utilize the shot clock to time 10-seconds. He(or she) is supposed to have a visual count for the 10 seconds and this job belongs to the trail. Besides, if the official keeps looking up at the shot clock, he can't maintain a view of the players in his primary area of responsibility.