Perhaps it was a blowout and wanted to work the change up and the defense? I have done it.Watched DD's high school coach continue to call changeup after changeup to a team whose batters were so far behind they were fouling the ball off between the backstop and the 1st base dugout. Why on earth someone would slow the ball down for someone that far behind is beyond me but I saw it time and time again. There is definitely skill involved in calling pitches. There are MLB catchers that have hung on in the bigs for years based greatly on their ability to call a good game.