This is a very good tip when you are playing the career mode or tournaments. After you finish a game, the physical percentage of your players decreases and maybe you're going to choose another one just to recover that percent, so save and quit your career, load it again and the physical percentage of your starting lineup will be much better.

While playing input YELLOW, RED, YELLOW, L, R, BLUE, GREEN to change the ball's size. (Unverfied)

Just press the right trigger and it will automatically change the song.