They've come from all over the country. Rise balls and long balls are their forte. Swatting mosquitoes on the field is the last thing they want to think about.
"Not one. Not one to speak of. Not one to buzz around your head, your ankles, nothing at all," said Janet Stafford of Florida.
Stafford traveled with her daughter's team from Tampa. They're here to try and win an ASA National fast pitch title.
We told her about the rising number of West Nile cases in South Dakota.
"We have far fewer mosquitos in South Dakota than we have had in past years, but the mosquitos we do have we're finding to be among the infectious kind," said South Dakota epidemiologist Lon Kightlinger.
This was Stafford's response, "When you hear that it makes you want to be more cautious. You want to apply bug spray especially in the early morning and evening games which we traditionally haven't been doing yet."
Stafford does have a few friends that have had West Nile. It took several doctor's appointments to find a diagnosis. Kightlinger says that's often the problem.
"Most people that get West Nile don't even know it, about 80 percent of people. So, we have healthy people walking around that have the virus in their blood stream and when they donate blood it's screened."