Summer Preseason I.D.
| Name | State | School | Class | Pos | Commitment |
| Joe Acker | WI | Marquette | 2016 | OF | Nebraska |
| Justin Baker | WI | Waukesha West | 2018 | 3B | Wisconsin-La Crosse |
| Jalen Bilty | WI | Waukesha West | 2015 | OF | |
| Alex Binelas | WI | Oak Creek | 2018 | 1B | Louisville |
| Ben Cameron | WI | Waukesha West | 2018 | C | |
| Frankie Cistaro | WI | Muskego | 2018 | SS | Minnesota-Duluth |
| Mitchell Cole | WI | New Berlin Eisenhower | 2018 | LHP | College of Lake County |
| Brady Cunningham | WI | Whitnall | 2017 | C | |
| Nicholas Destefanis | WI | Homestead | 2017 | SS | Quincy University |
| Brandon Dodge | WI | Waukesha South | 2018 | RHP | |
| Jacob Droese | WI | West Bend West | 2015 | RHP | |
| Jack Dwyer | WI | Marquette | 2016 | SS | Wisconsin-La Crosse |
| Devin Fish | WI | Eisenhower | 2018 | RHP | Salem University |
| Isaiah Glidden | WI | Nicolet | 2017 | RHP | Bradley |
| Conner Goodman | WI | Pewaukee | 2017 | 3B | Wisconsin-Milwaukee |
| Jack Hager | IL | Wheaton North | 2016 | 2B | Grinnell College |
| Ryan Hecht | WI | Marquette | 2017 | C | |
| Grant Hill | WI | Wausau West | 2018 | RHP | Minot State |
| Noah Hill | WI | Waukesha South | 2016 | SS | |
| Quinn Hyndiuk | WI | Brookfield East | 2016 | 1B | |
| Matt Keefner | WI | Arrowhead | 2018 | C | |
| Bryce Konitzer | WI | Mukwonago | 2018 | RHP | Illinois State |
| Sam Lukins | IL | Glenbard West | 2016 | OF | |
| Mitchell Lynch | WI | New Lutheran | 2017 | SS | |
| John Manley | WI | New Berlin Eisenhower | 2016 | OF | |
| Tanner Natzke | WI | New Lutheran | 2016 | C | Iowa Wesleyan University |
| Jordan Ohel | IL | Stevenson | 2015 | RHP | |
| Ty Olejnik | WI | Hamilton Sussex | 2018 | OF | Missouri |
| Anthony Osnacz | WI | Badger | 2016 | OF | |
| Joe Peck | WI | Milwaukee School of Languages | 2017 | 2B | |
| Ryan Potts | WI | New Berlin Eisenhower | 2016 | SS | College of Lake County |
| J.T. Reed | WI | Whitnall | 2016 | OF | JC of Lake County |
| Max Resch | WI | Pius XI | 2015 | RHP | |
| Alex Rodriguez | WI | Cudahy | 2017 | SS | Northern Illinois |
| Bryce Schure | WI | Muskego | 2017 | 3B | |
| Tanner Smith | WI | Kettle Moraine | 2017 | OF | Wisconsin-La Crosse |
| Ryan Spalding | WI | Menomonee Falls | 2018 | C | |
| Austin Stuckart | WI | New Berlin Eisenhower | 2016 | 2B | |
| Travis Styer | WI | Brookfield East | 2016 | SS | Aurora University |
| Jack Thelen | WI | West Bend West | 2017 | C | Wisconsin-Milwaukee |
| Jonathan Thompson | WI | Hamilton Sussex | 2017 | OF | |
| Aaron Trattner | WI | Nicolet | 2016 | 2B | Benedictine University (IL) |
| Jacob Varick | WI | Kettle Moraine | 2016 | RHP | Wisconsin-Oshkosh |
| Justin Weber | WI | New Holstein | 2016 | RHP | Wisconsin-Whitewater |
| Carson Youngquist | WI | Hamilton | 2016 | C | Des Moines Area CC |
| Stephen Zaborowski | WI | New Berlin Eisenhower | 2016 | RHP |