U must be watching the wrong thames buddy for saying that

My coach had us bite on our jersey while doing batting practice.. right above you shoulder

Body weight squats, Jump squats onto a higher platform, Sprints, Barbell squats, Quadriceps extension, hamstring curls, Glute ham bridges, Glute ham Raises on a ghr developer (look that machine up), Calf raises, Improving running form, high knees, etc.

Just do hammer curls, reverse curls, pull-ups, anything that works the radialis (look that muscle up)