The parents of Moisés Ballesteros traveled from Venezuela thinking they were going to see their son play for the Chicago Cubs' Triple-A affiliate in Iowa. Instead, the 21-year-old catcher was called up by the Cubs after Ian Happ was put on the 10-day injured list,

The Cubs came into this season believing they had the depth -- both in the Major Leagues and among their upper-level prospects -- to withstand unexpected setbacks and still remain firmly in a postseason chase.

The Cubs are calling up intriguing prospect Moisés Ballesteros to replace injured outfielder Ian Happ, and Eric Samulski explains why the catcher/first baseman brings major offensive potential to Chicago.

Of course, that doesn't mean Webb is likely to be the next man up for the Rangers – Chris Martin has been the team's best high-leverage reliever this season, but he had already pitched in a setup role before Jackson exited Monday.

The Cubs dipped into this depth last week, calling up right-hander Cade Horton with Shota Imanaga landing on the injured list. They're now primed to do so again.

The Chicago Cubs are as well represented as any team in the top 100 prospects list made by MLB Pipeline. They currently have six players on the list; third base