Here is a short list of all the mechanical faults that not only reduce velocity but increase pitching arm injuries.

To maximize velocity you must understand how to recognize faults and what is the cause of the fault.

1. Foot position on rubber
2. Weight shift
3. Hand break
4. Arm action
5. Back leg position before hand break
6. Lead leg action
7. Posture
8. Early hip rotation
9. Low elbow or high elbow
10. Completion of back leg drive
11. Landing position - body alignment
12. Landing leg stability
13. Bracing action of front leg and hip
14. Early trunk rotation
15. Ball release position
16. Finish position
17. Stride length
18. Back foot action at ball release
19. Amount of trunk lean at ball release
20. Showing back pocket or number to hitter
21. Poor arm cocked position at landing
22. Ball in close to head at landing
23. How the ball comes out of the glove
24. Position of back leg before weight shift

Most pitchers I see will have at least 7 of the faults!

What do you think happens if those faults are not corrected now?

Find a good instructor and Work on it!!