Wikipedia says the position of umpire is “analogous to that of a referee in many other sports.”

https://en.wikipedia.org/wiki/Umpire_(baseball)

Nice doggie!

I can’t believe someone downvoted you for asking about the acronym.

I get frustrated when the title, body, and comments all use an acronym, but I can’t figure it out from context. Even more frustrating is when the linked article also doesn’t explain it.

Whatever Costco has. I think it’s a clumping clay.

I looked into robots but decided to try a low-tech solution first. I got an Arm & Hammer brand sifting litter box for $20. I can clean the entire litter box in about 15 seconds.

I have no need for a robotic litter box anymore.