If you look somewhat closely at closeups of Happy's puts rolling on the greens, you can actually see a track in the grass that they made to guide the ball. There are about 5 shots throughout the movie where this is very obvious!! Especially in the scene where Happy is playing with Shooter, he over hits it and it loops around and goes back in.
I don't think that Happy isn't a good putter, it's just that the directors don't want to have to spend a long period of time on the one putt. It's just there to make the recording process go faster. That's all.
Do you actually think that Adam Sandler could hit the ball perfectly on every shot? And with the loop - how could that happen w/o a track of some sort?
No one should have been fired for that one!!! What if Adam Sandler really couldn't putt in the first place, how was he going to make the ball curve like that. They had to put a track so he could make it into the hole. Other wise they would have to make so many mistakes. This is not really a slip-up although they could have done a better job covering up the track.