Jake Simmons kept the Clark (1-1) off the board during his six innings of work and the Walla Walla (1-0) beat the Clark, 2-0.
Simmons struck out two and allowed no walks and four hits.
A bright spot for the Clark in the defeat was Chris Carns, who allowed only one run while striking out five.
Carns (0-1) was the game's losing pitcher.