Throwing bullpens in practice will not simulate the duties you have on the mound in the game as a fielder. There are a number of fielding situations if not executed correctly, could cost your team a win. Once you release...
Game Variables
Holding Runners
Bullpen sessions do not simulate the feeling of pitching late in a tight game with a fast runner on first base looking to get into scoring position. When you are focused on being quick to the plate and holding runners...
Adrenaline
You will rarely have an adrenaline rush during bullpen work while the exact opposite is true during games. Most pitchers get a handful of adrenaline rushes during every game and it's something that is hard...