Who hit the first home run for the Reds at the Great American

The first Cincinnati Reds player to hit a home run at Great American Ballpark was Austin Kearns, according to the Baseball Almanac. Kearns hit the home run on April 2, 2003, with one man on base, in the bottom of the first inning off of the Pittsburgh Pirates’ Kip Wells.

Source:

Baseball Almanac: Reds vs Pirates, April 2, 2003