1st Secret Achievement - Gamerpoints: 0
Get Max strokes on a Hole...
Keep hitting the ball, eventually the CPU will pick-up for you.

2nd Secret Achievement - Gamerpoints: 0
Get 10 Double Bogeys in a single round...
pretty self explanatory

Really not sure why games put these pointless achievements in the game. One thought maybe,
scenario:
so you have a rookie or just an awful tiger woods, or someone who decides to cut a huge dog-leg thinking they can make it with enough power but keeps hitting it O.B. or in the water (very similar to the ending to "Tin Cup") Anyways so they keep hitting it O.B. or in the water and keep going and going and finally the CPU has enough of the user embarrassing themselves so they pick up for them and viola, HOLY S%&# an achievement blip pops up.....

thats the only way someone could have figured this out with out looking on the internet....