A sport pepper is actually a sport pepper. It can sometimes be confused with a serrano pepper, and it’s very similar to what I would call a small serrano pepper, but the variety is actually called a “Mississippi sport pepper.” It is actually a thing. A small serrano pepper could be really close to it.
Now, where they’re grown is obviously Mississippi, [plus] Texas and Mexico. We buy the seed variety and then the growers plant it for us, and this is the best part: Vienna is the biggest buyer of Mississippi sport peppers in the world. We go through the most because of our hot dog. On a Chicago-style hot dog, the crown jewel is the sport pepper.
https://thetakeout.com/what-is-a-sport- ... 1849332297