It's funny how it says there's "one picture in existence" but the site just shows "watterson.jpeg" and no actual photo, even in old archives.
<div class="rawhtml">
<span class="resimg adv-photo-large" data-image="http://media.cleveland.com/ent_impact_home/photo/11001963-mmmain.jpg" data-position="article-main"></span>
</div>
https://image.cleveland.com/home/cleve-media/width2048/img/n...
He looks just like Calvin's dad for sure :)