Update:
Joel Sherman of the NY Post is reporting that Pineda is dealing with a forearm muscle strain, and that the injury is not related to the elbow. The injury is not considered serious. The Yankees have still not officially announced anything yet.
Still working to talk to more people, but told by #Yankees exec Pineda dealing with forearm muscle strain not elbow, not considered serious
As the Yankees watched the Blue Jays get David Price from the Tigers, they received even more bad news.