Obviously, you physically strike the ball or miss it. That's the goal.
I guess I'm not even sure what we mean by "mental game". Do we mean basic things like picking the correct club for a given shot or reading a putt? Or do we mean things like a person's resolve, temperament and focus? The first is trivial. Even I can generally sort out which club I should use in a given situation. If its the second, I'm not sure how you'd "practice" it.
Alternatively, maybe you'd define mental as simply the process of making decisions related to the game of golf. Would physical not simply be a reflection of the mental?
I mute the commentary alot of the time when i watch golf, anyway. I just have it playing on TV as a background thing. I understand TV producers and advertisers want conveinvent story lines with bold faced names. But i felt that the broadcast was clearly rooting agaist those two guys in favor of Spieth and it was distracting. Rooting for is one thing, but rooting against is awful. I see this kind of artificial king making more in golf than i do in any other of the pro sports. Its like the golf world has daddy issues or something.
I just received my combo set of Srixon 7-PW z765, 4-6 z565. Took them for a spin on the range yesterday. I absolutely love them. Beautiful looking clubs as well. Mine are +1/4", standard lie, PX LZ 5.5 and Blue/Black GP MC midsize grips. Very nice feel and quite forgiving (especially the 565.)