Every company is a little different. Working in a pro shop isn't totally essential, i know a few staffers that don't work in a pro shop or bowling center. That being said, this is an email from a brand on their requirements (not storm) My suggestion is to have a resume and send it in, Storm renews in November for the following year I believe. The worst that can happen is they say no.
"We select staff players based on bowling ability, bowling accomplishments, tournament schedule, involvement in a bowling center and/or pro shop, and location. The typical staffer has a 220+ league average, bowls in 2-3 leagues per week and 20+ tournaments per year, and has some involvement in a bowling center or pro shop."