Zunino moved into a tie for the major league lead in home runs by a catcher with his 18th of the season. Zunino’s opposite-field drive to right off Jose Quintana (6-8) in the fifth gave Seattle a 3-1 lead and came after Chicago third baseman Conor Gillaspie dropped a popup from Logan Morrison. Kendrys Morales added a sacrifice fly later in the inning.
Iwakuma (10-6) became the third Seattle pitcher with double-digit victories this season. He allowed one run and five hits.