Stanley Coveleski Regional Stadium is the home of the South Bend Silver Hawks of the Midwest League. The Silver Hawks are the Class A affiliate of the Arizona Diamondbacks.
During a drive from Toledo, Ohio to Davenport, Iowa, I took a few minutes to pull off the highway and take a look at Coveleski Stadium (the full name is a mouthful). Fortunately for me, the team offices are in the stadium and a very friendly woman at the front desk told me that I could wander the stadium and take pictures as much as I liked.

Before 1987, when Coveleski Stadium was built, the minor leagues only saw one or two new stadiums per year and some of these were rather makeshift affairs (see Harrisburg). Starting in 1987, someone realized that a ballpark wasn't simply seats around a field and a nicer stadium might just bring in more people.
Compared to the standard minor league park opening today, with luxury boxes, brick and stone facades, and the like, Coveleski is pretty simple. A seat and bench grandstand surrounds the field a good way down each foul line. The concourse is above the stands so the game can be seen while standing on line. The concourse is completely covered by a metal roof, with a press box and, perhaps a club behind home plate, but there are no rows of luxury boxes hovering over the main seating. The roof is mostly just that, a roof over the concourse.

Despite it straightforward design, in the next 15 years this would become the basic template for almost every minor league stadium built. That template has grown and expanded, but little Coveleski was among the first ripples of the wave that has swept across the minor league baseball world.