Rohan homered twice and drove in three runs Wednesday night, but the Iowa Cubs were beaten by the visiting Colorado Springs Sky Sox, 11-6.
Promoted from Double-A Tennessee before the game, Rohan capped an eight-pitch at-bat against Major League veteran Guillermo Moscoso by sending a 3-2 pitch over the left-field wall in the second inning at Principal Park.
"I was just trying not to think too much and trying to get a pitch to hit," said Rohan, who also singled in the eighth. "My first at-bat, I got to see quite a few pitches and was able to put a swing on a pitch to hit."
Rohan became the first Cub to homer in his first Triple-A at-bat since Eric Patterson -- who did it against R.A. Dickey -- on Aug. 19, 2006.
After striking out in the fourth, the 2009 21st-round Draft pick wasted no time in his third at-bat. Right after Cubs' No. 11 prospect Josh Vitters hit his 16th homer, Rohan turned on Moscoso's next offering and deposited it over the left-field fence.
"I'm really excited," the Kent State product said. "To homer twice in any game at any level, it's exciting."
After going yard three times in a week-long Southern League stint, Rohan has totaled five homers in his last seven games.
"I feel good. I've been working on stuff with Mariano Duncan in Tennessee and Dave Keller today on slowing things down and getting a good pitch to hit and not missing it," the 26-year-old first baseman said.
Rohan has improved his numbers each year as a pro. This season, he's batting .285 with a career-high 19 homers and 85 RBIs in 104 games across three levels.
"Working in the offseason, I got a chance to live in the training facility and work on baseball stuff the whole offseason," the Ohio native said. "I think that helped me a lot. I worked on everything, I tried to get stronger and better and talked a lot about approach. A lot of drills, really, and trying to find my swing."
Brett Jackson, Chicago's top prospect was 3-for-5 with a run scored and fell a homer shy of the cycle.
Chad Tracy drove in three runs and Tommy Field collected three hits and two RBIs for the Sky Sox.