That's another way to read it, but you can coach it nine ways from Sunday and if, in the moment, the player screws up, all the coaching in the world won't help. They could have, for instance, coached Verdugo to take just so much of a lead and not a secondary lead until Cordero made contact with the ball. If Verdugo acts on anticipation, though, the coaching goes out the window
Since, as
@absintheofmalaise put it, he called them out without calling them out, saying they need to work on it more is another way of saying the players aren't focusing on the play at hand.