Marco Hernandez had three hits, Daniel Vogelbach drove in three runs, and Jeimer Candelario hit a single and a double for Boise. Hayden Simpson took the loss, giving up three runs on two walks. He was unable to retire a batter.
Right-hander Pierce Johnson, selected in the compensation round of the June First-Year Player Draft and ranked No. 9 on the Cubs' Top 20 Prospects list, was slated to start Game 2 on Saturday.