Can you strengthen your legs to provide more velocity, along with long tossing and bullpen work?

You’re only as strong as your weakest link. Leg strength is one part of the equation. But if the other parts aren’t appropriately strong, then strengthening your legs might not buy you anything.

You need to strengthen all of the appropriate parts of the body.

Roger. WHat are all of the apprioate parts to work?

I’m no expert on strength training but I’d say that you should train your entire body. However, you shouldl train some parts more than others and you should train specific to the pitching motion meaning some concentric traininig but probably mostly eccentric training. You need strength without a lot of bulk. And you need to maintain flexibility.

Specifically, I’d say legs (quads and calves), core (abs, obliques, low back extensors, hip flexors, hip abductors, hip adductors), shoulders (rotator cuff, all of those little accelerator/decelerator muscles, triceps, and forearm flexors).