Read for yourself

[akalsey]

Assuming OBR, the umpires were right under 4.06(a)(3):

No manager, player, substitute, coach, trainer or batboy shall at any time, whether from the bench, the coach's box or on the playing field, or elsewhere ... Call "Time," or employ any other word or phrase or commit any act while the ball is alive and in play for the obvious purpose of trying to make the pitcher commit a balk.

That coach was completely in the wrong and was allowed to stay WAY to long.