The Calm Before the Storm
Mariano Rivera is a two-time all star and World Series MVP. More importantly, from a training viewpoint, his delivery is near picture perfect. If that's all this video from Frozen Ropes did - show off his pitching mechanics from every angle - it would be enough, but there's more. It also covers his strength and plyometric routines; it breaks down his delivery into instructional components; it covers his grips, and gives every coach and player a sound basis for developing a complete pitching program for themselves.