You state...""give him a little slowdown in the windup or quick pitch or sneak up on him with a fast release... anything off your regular rhytmic windup & delivery will foul up his timing""
George,
Pitchers work very hard on repeating their delivery for a reason. Trying to locate any pitch while trying to change the rythm and normal delivery is very very difficult. They are better off locating the pitch where they would like with a repeatable delivery.
According to you, pitchers are doing just fine against Sheffield, he stinks so why change it right.