After investigating, the department believes the fire was set intentionally.
Leaders with OYSC said they now need money to replace equipment for the players because they lost everything in the fire, from soccer balls to lawn mowers to concession equipment.
That totals to about $50,000-$60,000 worth of equipment, according to the club's president David Edwards.
They had some insurance, but not enough to cover all costs.
Now, they're asking for anyone who wants to donate to bring in used items to Play it Again Sports in Oshkosh. The business will give money to the soccer program for all donations made.
"I was told right away that it was most likely arson, just trying to figure out why somebody would do that," Edwards said. "Then moved into the rebuilding phase right away. We have to get everything back up so the kids can have their season, which they will."
Donations are tax deductible and you can get a discount on your next purchase.
The donation drive will run through the end of October. There will be other donation drives as well over the next few months before the season starts in May.