Coach orders batter to stand on plate

[drh898]

Had an interesting situation in a U-14 girls FP tournament this weekend. Home team behind by 2 runs with time close to expiring. 2 outs, no one on base and week hitter at plate. Coach orders batter to stand on plate to create 3rd out so that the next inning could be played. PU becomes confused and asks coach why and coach says she wants the 3rd out. PU immediately signals 3rd out and next inning is played and home team, with the extra inning, wins 7-6. Question, PU explained that he called batter out because he did not want her stading on plate with a pitch thrown for obvious reasons. Was this the right call? If not, what would you have done?