These are good! If you can think of any others ... add them to the list.
It was my first time at the course. I didn't get a chance to warm up. I haven't had enough time to practice lately. It's impossible to score in this weather. It was too long of a wait between shots. I felt rushed My mind was elsewhere today. Those pins were unfair I just couldn't score My caddie was giving me bad reads all day. (Bones... you are outta here!) The water coolers were empty, felt like I was going to pass out. The guys I was playing with struggled, and it brought down my game. I didn't dress appropriately for this weather My shirt was too tight The greens weren't holding. I mentally checked out I was just worn out I drank too much I ate too much before the round I couldn't catch a break I was using borrowed equipment My distances were off all day My back was killing me (my personal favorite) I just had a lesson I had the yips I was nervous The greens were just aerated I was just trying to have fun I suck!
Golf Digest article with some funny blurbs about each one.