Faletau, 33, of Cardiff, hasn’t participated in a game since suffering an arm break against Georgia at the World Cup. His return to training was expected to happen in time for the Six Nations, but a calf problem has forced him to wait until the following month. On Tuesday, Gatland is expected to announce his Six Nations team. Nevertheless, Faletau’s injury and Jac Morgan’s departure will leave the head coach without two of his three first-choice backrow players for the competition. On February 3, Wales will play Scotland in Cardiff.