I'll add a couple to the list...

Caught the mast on the under side of my forearm during a demast once. Was trying to protect my crew from being popped in the head. Ended up having a nice black and blue mark that covered half my forearm. On the same day, as we are about the put the boat on the trailer, my brother (crew) was standing behind the boat as I was tying the tiller, one of the rudders popped loose and landed on the top of his foot. I was afraid that it broke his foot but just left a large black and blue mark for 2 weeks.

Another story, not so much injury but pretty funny. About to head out with my wife, we are standing in knee deep water putting on our vests when my wife let out a huge scream and yelled "something bit me". Laughing my a$$ off at her ability to move on top of the water I happened to look down. Out from under the boat was this puffer fish coming straight at me. I started to back up and it continued to come after me. Needless to say I was moving just as fast as she was out of the water. This little bugger ended up biting her on the small toe and left a nice little welt. We laughed about it the entire sail on just the fact of how aggressive this little fish was.