I just recently discovered that Sanjay’s Super Team is rated PG. Does anybody have any idea why, and also if there are any other Pixar shorts with a PG rating?
You were looking on Amazon Video, weren’t you? 
No, it’s on the back of the Good Dinosaur DVD case.
It’s also on the short’s Wikipedia page, where it also mentions that the only other PG-rated Pixar short is Party Central. So I’m glad I finally got my question answered, since it certainly wasn’t going to be answered on this board.