This article by Osborne and Gatt titled ‘Management of shoulder injuries using dry needling in elite volleyball players’ makes for a very interesting read.
Their study describes the short-term benefits of dry needling in shoulder injuries in four international female volleyball athletes during a month-long intense competitive phase, using both replicable subjective and objective measures. The paper finds that trigger point dry needling has been successful in treating athletes with myofascial pain and impingement symptoms but with only subjective improvement and not during a competitive phase. These cases support the use of dry needling in elite athletes during a competitive phase with short-term pain relief and improved function in shoulder injuries.
A great read to further your understanding of the effectiveness of dry needling: https://www.ncbi.nlm.nih.gov/pubmed/20351377/.