The former Indiana star came through, launching a double off the center-field wall that brought home Arismendy Alcantara for a walk-off win.
Schwarber joined Iowa this week after a short stint with the big league club in which he hit .364/.391/.591 with a homer and six RBIs in six games.
"He really handled himself well in the clubhouse and with his teammates," Cubs general manager Theo Epstein told MLB.com's Carrie Muskat after Schwarber was optioned to Iowa. "I think he earned a lot of respect for his approach to this game, probably learned a few things about what goes into being a big leaguer. "It was a best-case scenario for as well as it could have went, and he's really excited to get to Iowa and keep growing as a catcher and player."
Schwarber's mid-June promotion to the bigs was spurred by an offensive onslaught at Double-A Tennessee. Over the first two months of the season, he hit .320/.438/.579 with 10 doubles, 13 dingers and 39 RBIs.
Alex M. Smith is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.