Caissie and utility player Willi Castro, whose first home run with the Cubs accounted for three runs in the third inning, combined to drive in all six of the team’s runs in Game 1. Caissie’s first major-league homer came in the sixth, a solo shot to the opposite field.

The Cubs rookie outfielder came through in a big way at the plate during Tuesday's 6-4 victory over the Brewers.

Caissie suffered a groin strain early in spring training, and his body was still working its way to 100 percent at that point. But Caissie and the Cubs knew he had work to do. “We were aware of it,” Caissie said.