What happened?

[casil403]

Hi again everyone...I was wondering if you could help me understand what I did incorrectly while trying to capture my dog playing frisbee. I was doing quite a bit of multi-taking here...photo taking, throwing frisbee, getting Chase in the shot etc. etc. but all the shots came back quite dark and not in focus very well. I did use a tripod for the shots and a cable release.
The first shot is the original, the second is a crop and some pp. Here's the exif data:
Shutter priority ...plus I had the shake reduction setting turned on.
ISO 200 - would ISO100 made a difference?
Sunny white balance
1/1000
F9.5 - should this have been larger or smaller? I let the camera pick it.
50mm focal length
Flash not used
spot metering (I know that was incorrect for sure..probably center weighted?)

Thanks ever so much for your input!