| Name | State | School | Class | Pos. | Commitment |
| Frankie Accurso | IA | Des Moines Christian | 2019 | - | Grand View University |
| Jackson Adams | IA | Waukee Northwest | 2023 | SS | Augustana (SD) |
| Ely Adams | IA | Pleasant Valley | 2019 | 3B | Black Hawk JC |
| Colby Adams | IA | Waterloo West | 2021 | - | Coe College |
| Brock Adamson | IA | Ankeny | 2023 | LHP | Ellsworth CC |
| Carter Ades | IA | Sioux Falls Roosevelt | 2018 | 1B | Morningside |
| Tyus Adkins | IA | Iowa City West | 2014 | 3B | Upper Iowa |
| Cade Adkins | IA | Iowa City West | 2022 | C | William Jewell |
| Zeb Adreon | IA | Pleasantville | 2016 | OF | Iowa |
| Carson Agan | IA | Ankeny | 2023 | 3B | Ellsworth CC |
| Peyton Agan | IA | Ankeny | 2019 | OF | Grand View University |
| Jalen Aguiniga | IA | Southeast Polk | 2021 | 2B | Grand View University |
| Jace Aguiniga | IA | Southeast Polk | 2022 | 2B | Ellsworth CC |
| Sergio Alaniz | IA | Johnston | 2015 | 2B/MIF | Ellsworth CC |
| JD Alberhasky | IA | Iowa City High | 2019 | - | Central College |
| Braden Albert | IA | Cedar Rapids Xavier | 2019 | LHP | Upper Iowa |
| Carson Albrecht | IA | Pleasant Valley | 2021 | 2B | Central College |
| Chino Alcala | IA | Des Moines East | 2015 | 1B | North Iowa Area CC |
| Peyton Aldrich | IA | West Delaware | 2023 | C | Central College |
| Justin Aldrich | IA | Sioux Falls Roosevelt(SD) | 2017 | RHP | Sioux Falls |
| Anthony Alepra | IA | Cedar Rapids Kennedy | 2017 | RHP | Northwestern |
| Austin Allard | IA | Akron-Westfield | 2017 | RHP | South Dakota State |
| Jack Allison | IA | Southeast Polk | 2020 | 3B | Coe College |
| Aaron Allsup | IA | Martensdale St. Marys | 2018 | 1B | Southwestern CC |
| Michael Alvarado | IA | Davenport Assumption | 2015 | OF | Saint Ambrose |
| Benjamin Amador | IA | Ames | 2022 | RHP | Southwestern CC |
| Kyle Amendt | IA | Pleasantville | 2018 | RHP | Southeastern CC (IA) |
| Greg Anderberg | IA | Ankeny | 2016 | C | Ellsworth CC |
| Wyatt Andersen | IA | Tri-Center | 2019 | SS | South Dakota State |
| Pierce Anderson | IA | Johnston | 2023 | 3B | Kirkwood CC |
| Reece Anderson | IA | Johnston | 2019 | OF | South Dakota State |
| Luke Anderson | IA | Central Dewitt | 2020 | LHP | Palm Beach SC |
| Kayden Anderson | IA | Glenwood | 2024 | SS | Nebraska |
| Colin Anderson | IA | Ballard | 2018 | - | Grand View University |
| Nathan Anderson | IA | Bondurant-Farrar | 2020 | RHP | Wayne State College (NE) |
| Blake Anderson | IA | Dowling Catholic | 2022 | 3B | Johnson County CC |
| Tyler Anderson | IA | Chariton | 2018 | SS | Mount Mercy |
| Nic Anderson-Vine | IA | Central Coast Grammar | 2018 | OF | Iowa Central CC |
| Cooper Andreassen | IA | English Valleys | 2019 | - | Mount Mercy |
| William Angstman | IA | Cedar Rapids Xavier | 2018 | RHP | Luther College |
| Beck Anshutz | IA | Des Moines Roosevelt | 2019 | 3B | Iowa Lakes CC |
| Foster Anshutz | IA | Des Moines Roosevelt | 2015 | LHP | Iowa Central CC |
| Evan Appenzeller | IA | Boone | 2018 | RHP | Des Moines Area CC |
| Reece Arbogast | IA | Sioux Falls O'Gorman (SD) | 2021 | LHP | South Dakota State |
| Ganon Archer | IA | Van Meter | 2022 | RHP | Iowa |
| Kael Arends | IA | MOC Floyd Valley | 2023 | C | Briar Cliff University |
| Carter Arends | IA | Iowa Falls Alden | 2022 | RHP | Ellsworth CC |
| Ty Arguello | IA | Newton | 2019 | C | Iowa Central CC |
| Jesus Arias | IA | Santo Domingo | 2021 | 1B | Southeastern CC (IA) |
| Camden Armstrong | IA | Clear Creek-Amana | 2018 | - | Ellsworth CC |
| Cade Armstrong | IA | Clear Creek-Amana | 2020 | - | Ellsworth CC |
| Will Armstrong | IA | Des Moines Roosevelt | 2020 | SS | Wartburg College |
| Theo Arndt | IA | Charles City | 2018 | 2B | Wartburg College |
| Kolton Arnold | IA | Norwalk | 2017 | - | Simpson College |
| Kam Arons | IA | Bettendorf | 2017 | 1B | Kirkwood CC |
| Tristen Arrick | IA | Council Bluffs Lincoln | 2018 | - | Morningside |
| Gavyn Ashley | IA | Muscatine | 2018 | SS | Ellsworth CC |
| Rick Atkins | IA | Marion | 2019 | LHP | South Dakota State |
| Logan Augustine | IA | Urbandale | 2014 | LHP | Lincoln Memorial |
| Tucker Babbitt | IA | Moravia | 2018 | OF | Southwestern Illinois JC |
| Ryan Bachman | IA | Rapid City (SD) | 2020 | - | Minnesota State |
| Blake Bagenstos | IA | Dowling Catholic | 2016 | RHP | Truman State University |
| Joseph Bagley | IA | Southeast Polk | 2018 | RHP | Grand View University |
| Kieran Bailey | IA | Des Moines Roosevelt | 2021 | LHP | Kirkwood CC |
| Tanner Bainbridge | IA | Pekin | 2019 | SS | William Penn |
| Cam Bainbridge | IA | Kingsley-Pierson | 2018 | SS | Morningside |
| Cole Baker | IA | Dallas Center Grimes | 2015 | RHP | Iowa |
| Bryce Ball | IA | Mason City Newman Catholic | 2016 | 1B | Dallas Baptist |
| Dylan Bangs | IA | Boone | 2020 | C | North Iowa Area CC |
| Caleb Banowetz | IA | Calamus-Wheatland | 2020 | LHP | Kirkwood CC |
| Nick Banowetz | IA | Cedar Rapids Xavier | 2020 | C | Southeastern CC (IA) |
| Cory Bantam | IA | Woodbine | 2022 | 3B | Des Moines Area CC |
| Alex Bantam | IA | Woodbine | 2019 | RHP | Ellsworth CC |
| Frankie Baratta | IA | Des Moines Lincoln | 2018 | SS | Grand View University |
| Weston Barber | IA | Waukee | 2022 | - | Southwestern CC |
| Zach Barden | IA | Cedar Rapids Prairie | 2020 | OF | Mount Mercy |
| Tyse Barker | IA | Ottumwa | 2022 | LHP | William Penn |
| Bret Barnett | IA | Martensdale St. Mary's | 2017 | LHP | South Dakota State |
| Caiden Barnett | IA | Cedar Falls | 2020 | SS | Marshalltown CC |
| Ryan Barr | IA | Newton | 2019 | C | Mount Mercy |
| Matt Barragy | IA | Gilbert | 2019 | RHP | North Iowa Area CC |
| Tony Barreca | IA | North Scott | 2018 | C | Georgetown |
| Adam Barrett | IA | Council Bluffs Abraham Lincoln | 2016 | OF | Marshalltown CC |
| Easton Barrus | IA | Belmond-Klemme | 2019 | SS | Grand View University |
| Jacob Barton | IA | Waukee | 2021 | OF | Iowa Central CC |
| Tolik Bartz | IA | Winterset | 2019 | C | Cornell College |
| Stuart Baruth | IA | Sioux Falls Roosevelt (SD) | 2015 | - | Ellsworth CC |
| Jase Bauer | IA | Ankeny | 2021 | SS | Central Michigan |
| Kaleb Bauer | IA | Southeast Warren | 2019 | - | Southwestern CC |
| Cam Baumann | IA | Fairfield | 2017 | LHP | Iowa |
| Carter Baumler | IA | Dowling Catholic | 2020 | RHP | Texas Christian |
| Trever Baumler | IA | Dowling Catholic | 2024 | RHP | Texas Christian |
| Marcus Beatty | IA | Independence | 2022 | OF | Southeastern CC (IA) |
| Drew Beazley | IA | Johnston | 2018 | SS | South Dakota State |
| Justin Beck | IA | Davenport North | 2016 | RHP | Black Hawk JC |
| Trenton Beck | IA | Lenox | 2023 | OF | Tabor College |
| Cody Beck | IA | Dubuque Hempstead | 2018 | 1B | Loras College |
| Riley Beck | IA | Cedar Rapids Xavier | 2018 | SS | Purdue-Northwest |
| Jared Beck | IA | Davenport North | 2018 | LHP | Saint Leo |
| Trey Beckman | IA | Cedar Rapids Prairie | 2015 | OF | Wabash Valley JC |