Dubuque Shamrocks - Iowa - Vintage Defunct Baseball Teams - Unisex T-ShirtDubuque's Shamrocks took the field in 1903 as part of the Illinois Indiana Iowa League. Along the Mississippi River bluffs, minor league ball was the heartbeat of small Midwestern towns. Dubuque, Iowa carried that tradition with pride in an era when every city's diamond meant something real. Part of our Defunct Baseball collection, inspired by the vintage Minor League teams of yesteryear. The Details: Arched distressed white text reads "SHAMROCKS"