The use of electromyographic biofeedback (EMG-BF) in injury rehabilitation is amply referenced in psychological literature. Despite the pioneering work in the early eighties, in sports, it has hardly transcended its usage in sports injury rehabilitation. A study of twelve cases on professional players from the Spanish league grouped into two different types of pathologies (fractures in the upper limbs and knee injuries) that have been treated to EMG-BF parallel with an established rehabilitation plan is presented by each club's medical team. An ABA design is used. Each session is recorded online pre and post to determine the EMG gain reached at each point of the session. The procedure is considered to be completed when the player stably reaches criteria established by the hemilateral member. In all cases more than one session tracking is outtaken. All cases include notoriously stable improvements. The overall results support the conclusion that the EMG - BF is effective in these pathologies.