You don’t have to be fast or strong to field a ball, throw a ball, or hit a ball. Some of the fastest pitchers, best hitters, and best fielders I ever knew or saw did not have good speed or quickness and were not strong. Had they been quicker, faster and stronger, they would have probably been better. But taking too much time away from skill training to work on conditioning is risky, especially since we’re talking about working with individuals as young as 10y.o. What will make or break a young ball players is skill with the glove, the arm and the bat. Power is great, as is quickness and speed. Those who possess power and speed, and who also have the skill, will be more likely to succeed. But unlike football, or even some positions in basketball (i.e. power forward) you can’t overcome a lack of skill with power and speed. Skill domintates baseball, and that should be the focus in any young ball players training program.