That doesn't make any sense. I've never heard of an outboard having any damage from not "winterizing". I know of a lot of people that with outboards that don't do anything to them for winter aside from pulling the boat out of the water.Initial post, didnt winterize it properly.
And OP, fucking pics dude!
Only thing I can think of is that the gearcase had a leak and got water in where the oil should be, froze, and cracked.