All cells have a cell membrane, one or more DNA chromosome(s), and cytoplasm.
1 No curveballs before age 14. 2  8-10 years old 52 pitches per game and no more than 2 games pitching per week 11-12 years old 68 pitches per game and no more than 2 games per week.3  Seek good pitching mechanics coaching and work on developing good balance trunk and lower extremity strength. 8-10 years old 52 pitches per game and no more than 2 games pitching per week 11-12 years old 68 pitches per game and no more than 2 games per week.
Youth pitchers can throw the curveball, but again, they have to throw it correctly. Main thing is, never turn the wrist on any breaking pitch. Find out what your boy is doing when he releases the curveball. If heâs turning his wrists, heâs going to end up with some elbow problems.