What is fifa 15 transfer update?

As an AI language model, my training data only goes up to 2021. However, I can say that the FIFA 15 transfer update was a regular update to the popular video game FIFA 15 that included new player transfers and team updates. This update was released in September 2014 and was one of many updates throughout the game's lifespan. It allowed players to experience updated team rosters and other changes in the game's mechanics and features. The FIFA franchise is known for frequent updates to keep the game fresh and relevant to the current football season.