Iowa scored one run in the top of the first to lead briefly but only scored one run the rest of the way.
Missions starting pitcher Thomas Jankins, who picked up the win, also drove in San Antonio’s first run with a line drive to left in the third inning. Jankins and Trent Grisham scored later in the inning and the Missions had all the runs it turned out they needed.
Lucas Erceg hit his 11th home run of the season, a two-run blast in the fourth to make it 5-2.
Dubon hit his 12th home run of the season and Spangenberg hit his seventh back-to-back in the fifth inning.
Blake Allemand added his second home run of the season in the seventh inning.
The Missions finished with 11 hits.
Jankins (8-2) pitched six innings and gave up two runs on seven hits with four strikeouts and one walk.
Jon Olczak, who was activated off the injured list earlier in the day, pitched two innings and Donnie Hart pitched the ninth to finish the game for the Missions.
