52 degrees, overcast and windy. Wasn't planning to play 18. Left shoulder pretty bad. But, no one was on the course and figured I could fly through the 2nd 9 and be done before dark. Played the back 9 first, thinking I was only playing 9, since I haven't played the back for a while. Definitely felt negative feedback from left shoulder. Was having difficulty finishing swings. Only got me in trouble with one drive (on 4), where I had to take an unplayable penalty. A few poor iron shots, but otherwise, played okay. Actually hit 3W pretty well today. Putting was only average. Nothing spectacular. Don't know if I should have pushed the shoulder for 18, but what's done is done. We'll see how it feels in the morning.