Rejected Halloween Costume

Not all of Sam's Halloween costumes live to see the light of day (or night in this case). Often the topic doesn't come up until about October 30th, and then there is the desperate scramble to come upp with something. Below is one such example -- I believe this is actually three pairs of shorts:

The above idea was scrapped, and Sam settled on this:

We don't have a picture of Pete in his costume, but imagine Sam's costume above but replace the green with red, and replace the Dodgers hat with a large horse's head.