Summer Preseason I.D.
| Name | State | School | Class | Pos | Commitment |
| Peter Ahn | WI | Marquette | 2017 | SS | Michigan State |
| Evan Albrecht | WI | West Bend West | 2018 | SS | Purdue |
| Justin Baker | WI | Waukesha West | 2018 | 3B | Wisconsin-La Crosse |
| Nick Beilfuss | WI | Mukwonago | 2017 | 3B | |
| Brett Brandner | WI | Menomonee Falls | 2018 | 2B | |
| Brendan Collins | IL | St. Laurence | 2018 | SS | Wisconsin-Parkside |
| Nicholas Destefanis | WI | Homestead | 2017 | SS | Quincy University |
| Sam Devorkin | WI | Grafton | 2017 | C | Rock Valley JC |
| Brandon Dodge | WI | Waukesha South | 2018 | RHP | |
| Devin Fish | WI | Eisenhower | 2018 | RHP | Salem University |
| Tyler Gaecke | WI | Mukwonago | 2018 | OF | Wisconsin-Oshkosh |
| Patton Germann | WI | Sussex-Hamilton | 2019 | SS | |
| Nick Gile | WI | Menomonee Falls | 2017 | 2B | Madison JC |
| Peter Go | WI | Heritage Christian | 2017 | 1B | |
| Jordan Gomez | WI | Homestead | 2019 | 3B | |
| Daniel Hahn | WI | Cudahy | 2018 | SS | Concordia University (WI) |
| Ryan Hecht | WI | Marquette | 2017 | C | |
| MJ Houdek | WI | Brookfield Central | 2017 | C | University of St. Thomas |
| Joshua Hunt | WI | Waukesha West | 2017 | LHP | |
| Bryce Konitzer | WI | Mukwonago | 2018 | RHP | Illinois State |
| Alessandro Kulutbanis | WI | Homestead | 2018 | C | |
| Luke Kundinger | WI | Waukesha West | 2017 | SS | |
| Nick Leszczynski | WI | Brookfield Central | 2018 | C | |
| Collin Mahn | WI | South Milwaukee | 2017 | 1B | |
| Eric Modaff | WI | Oregon | 2017 | OF | Wisconsin-Oshkosh |
| Dylan Moser | WI | Homestead | 2017 | OF | Milwaukee Area Technical JC |
| Joe Peck | WI | Milwaukee School of Languages | 2017 | 2B | |
| Fernando Rodriguez | WI | Saint Thomas More | 2017 | OF | |
| Bryce Schure | WI | Muskego | 2017 | 3B | |
| Ricky Serrano | WI | Wauwatosa East | 2017 | C | |
| Jake Simuncak | WI | South Milwaukee | 2017 | SS | |
| Jordan Skogh | IL | Barrington | 2017 | 2B | |
| Bobby Smith | WI | Oak Creek | 2017 | LHP | |
| Brian Sullivan | WI | Whitnall | 2017 | OF | |
| Keegan Torkilson | WI | New Berlin West | 2019 | SS | Milwaukee Area Technical JC |
| Sam Valona | WI | West Allis Hale | 2017 | OF | |
| John Vanderploeg | WI | Sheboygan Falls | 2017 | LHP | Campbell |
| Casey Wade | WI | Germantown | 2019 | RHP | |
| Cameron Wiczek | WI | Whitnall | 2019 | OF | |
| Jacob Wilde | WI | Waukesha West | 2019 | LHP | Madison JC |
| James Winters | WI | Waukesha North | 2017 | 2B |