David Kubiak held the Gateway Grizzlies (2-7) scoreless for seven innings to boost the Joliet Slammers (5-4) to a 2-1 victory.
Kubiak struck out four and allowed five walks and two hits.
Dejai Oliver pitched seven innings and allowed one earned run, five hits and one walk while striking out three.
Oliver (0-2) took the loss for the Gateway Grizzlies.