...have to agree with the posts above. However, one point of caution...
In long toss drills, the catchers will be the only players who will be clotheslining the ball. From personal experience, with my son, the catchers need to do a bit more stretching and limbering before long-toss drills to avoid injury.
Along those same lines, keep in mind that stretching routines are typically "middle-of-the-road" for most teams. They are designed to get the team, as a whole, ready for a game. HOWEVER... Each boy must know his own body, and the specific demands of his position. The catcher, more than any other player on the field, including the pitcher, must take pre-game and pre-workout stretching to a personal level to insure that he's ready to do what's expected of him.