Yasiel Puig spent his morning heaving a 30-pound medicine ball against a concrete wall. Over, and over, and over.Puig's baseball work was curtailed for a second day Friday morning due to inflammation above his right knee. He is expected back on the field soon, Dodgers manager Don Mattingly said, but even small injuries are worth monitoring this spring with the short schedule.The Dodgers board a plane for Australia, where they open their season -- three weeks from Sunday.