#10 Golfer: "Think I'm going to drown myself in the lake."
Caddy: "Think you can keep your head down that long?"

#9 Golfer: "I'd move heaven and earth to break 100 on this course."
Caddy: "Try heaven, you've already moved most of the earth."

#8 Golfer: "Do you think my game is improving?"
Caddy: "Yes sir, you miss the ball much closer now."

#7 Golfer: "Do you think I can get there with a 5 iron?"
Caddy: "Eventually."

#6 Golfer: "You've got to be the worst caddy in the world."
Caddy: "I don't think so sir.  That would be too much of a coincidence."

#5 Golfer: "Please stop checking your watch all the time.  It's too much of a distraction."
Caddy: "It's not a watch - it's a compass."

#4 Golfer: "How do you like my game?"
Caddy: "Very good sir, but personally, I prefer golf."

#3 Golfer: "Do you think it's a sin to play on Sunday?
Caddy: "The way you play, sir, it's a sin on any day."

#2 Golfer: "This is the worst course I've ever played on."
Caddy: "This isn't the golf course.  We left that an hour ago."

and the #1 best caddy comment:

Golfer: "That can't be my ball, it's too old."
Caddy: "It's been a long time since we teed off, sir."