Jeff Knurek

• If you don't know the Jumble, now you know.
• Here's a nice article properly crediting Jeff for the invention of Spikeball.
• And here's a Wikipedia entry for Roundnet (basically Spikeball, but an entry that credits Jeff)
• Jeff was also a guest on this podcast (talking about Spikeball, of course).
• He helped found The Tweedy Show Client Union as well
• And here is Jeff's Instagram
• As well as Sue Miller Tweedy's, where all previous episodes of The Tweedy Show can be found