Player Draft
| Name | State | School | Class | Pos. | Year | Round | Team |
| Andrew Baker | FL | Ridge Community | 2016 | LHP | 2016 | 36 | Indians |
| Darren Baker | CA | Jesuit | 2017 | 2B | 2021 | 10 | Nationals |
| Alec Baker | MA | East Longmeadow HS | 2018 | RHP | 2023 | 18 | Diamondbacks |
| Daniel Bakst | NY | Poly Prep Country Day | 2016 | SS | 2016 | 27 | Orioles |
| Jordan Balazovic | ON | St. Martin's Collegiate SS | 2016 | RHP | 2016 | 5 | Twins |
| Thomas Balboni | FL | St John Neumann | 2019 | RHP | 2022 | 15 | Padres |
| Merrick Baldo | CA | Mira Costa | 2019 | RHP | 2023 | 17 | Nationals |
| Drake Baldwin | WI | Madison West | 2019 | C | 2022 | 3 | Braves |
| Brooks Baldwin | NC | Whiteville | 2018 | SS | 2022 | 12 | White Sox |
| Cameron Balego | PA | Pittsburgh Central Catholic | 2013 | SS | 2017 | 30 | Cubs |
| Trey Ball | IN | New Castle | 2013 | LHP | 2013 | 1 | Red Sox |
| Bryce Ball | IA | Mason City Newman Catholic | 2016 | 1B | 2019 | 24 | Braves |
| Sam Ballard | IL | Alton | 2016 | LHP | 2019 | 28 | Padres |
| Will Banfield | GA | Brookwood | 2018 | C | 2018 | Comp Bal B | Marlins |
| Brett Banks | NC | Garner Magnet | 2019 | RHP | 2023 | 11 | Mets |
| Caleb Baragar | MI | Jenison | 2012 | LHP | 2016 | 9 | Giants |
| Joe Baran | PA | Hazleton Area | 2015 | LHP | 2018 | 22 | Brewers |
| Colin Barber | CA | Pleasant Valley | 2019 | OF | 2019 | 4th | Astros |
| Hunter Barco | FL | Bolles | 2019 | LHP | 2022 | 2 | Pirates |
| Matthew Barefoot | NC | Midway | 2015 | OF | 2019 | 6 | Houston Astros |
| Alec Barger | IL | Champaign Central | 2016 | OF | 2019 | 17 | Braves |
| Jimmy Barnes | VA | Deep Creek | 2015 | SS | 2015 | 11 | Angels |
| RJ Barnes | OH | Sycamore | 2017 | OF | 2017 | 34 | Reds |
| Mason Barnett | GA | Cartersville | 2019 | RHP | 2022 | 3 | Royals |
| Tucker Barnhart | IN | Brownsburg | 2009 | C | 2009 | 10 | Reds |
| Zane Barnhart | OH | Medina Highland | 2020 | SS | 2023 | 17 | Orioles |
| Hunter Barnhart | CA | St. Joseph | 2020 | RHP | 2020 | 3 | Tampa Bay |
| Boston Baro | CA | Capistrano Valley | 2023 | SS | 2023 | 8 | Mets |
| Cole Barr | IN | Yorktown | 2017 | 3B | 2021 | 15 | Mariners |
| Chris Barraza | AZ | Sahuarita | 2018 | RHP | 2023 | 10 | Angels |
| Brett Barrera | CA | Huntington Beach | 2019 | SS | 2022 | 8 | Yankees |
| Brandon Barriera | FL | American Heritage Plantation | 2022 | LHP | 2022 | 1 | Blue Jays |
| Braden Barry | KY | Trinity | 2020 | OF | 2023 | 8 | Blue Jays |
| Cole Bartlett | IN | Hagerstown | 2013 | RHP | 2017 | 25 | Diamondbacks |
| William Bartlett | FL | IMG Academy | 2019 | C | 2019 | 9th | Cleveland Indians |
| Luke Bartnicki | GA | Walton | 2018 | LHP | 2018 | 29th | Diamondbacks |
| Joey Bartosic | VA | Oakton | 2013 | OF | 2017 | 19 | Rockies |
| Brad Bass | IL | Lincoln-Way Central | 2014 | RHP | 2017 | 7 | Tigers |
| Brett Bateman | MN | Mounds View | 2020 | OF | 2023 | 8 | Cubs |
| Jalen Battles | TX | James Madison | 2018 | SS | 2022 | 5 | Rays |
| Michael Baumann | MN | Mahtomedi | 2014 | RHP | 2014 | 34 | Twins |
| Garrett Baumann | FL | Hagerty | 2023 | RHP | 2023 | 4 | Braves |
| Jackson Baumeister | FL | Bolles | 2021 | RHP | 2023 | 2-B | Orioles |
| Carter Baumler | IA | Dowling Catholic | 2020 | RHP | 2020 | 5th | Baltimore Orioles |
| Nickey Bautista | CA | Esteban E. Torres | 2020 | RHP | 2022 | 16 | Rangers |
| Jamari Baylor | VA | Benedictine | 2019 | SS | 2019 | 3rd | Phillies |
| Parker Bean | PA | South Western | 2013 | OF | 2016 | 36 | Brewers |
| James Beard | MS | Loyd Star | 2019 | OF | 2019 | 4 | White Sox |
| Wade Beasley | AR | Horatio | 2018 | RHP | 2018 | 24 | Milwaukee Brewers |
| Cameron Beauchamp | IN | Peru | 2016 | LHP | 2019 | 36 | Phillies |
| Dylan Beavers | CA | Mission Prep | 2019 | OF | 2022 | CBA | Orioles |
| Zach Becherer | IL | Lebanon | 2014 | LHP | 2016 | 15 | Braves |
| Marty Bechina | IL | St. Rita | 2015 | 3B | 2019 | 32 | Athletics |
| Andrew Bechtold | PA | Garnet Valley | 2014 | SS | 2017 | 5 | Twins |
| Jared Beck | IA | Davenport North | 2018 | LHP | 2022 | 13 | Orioles |
| Austin Beck | NC | North Davidson | 2017 | OF | 2017 | 1 | Athletics |
| Jordan Beck | AL | Hazel Green | 2019 | OF | 2022 | CBA | Rockies |
| Brendan Beck | CA | Corona | 2017 | RHP | 2021 | 2 | NYY |
| Brandon Beckel | TX | Antonian Prep | 2020 | RHP | 2023 | 12 | Phillies |
| Austin Becker | OH | Big Walnut | 2018 | RHP | 2022 | 16 | Rockies |
| Ian Bedell | IA | Davenport Central | 2018 | RHP | 2020 | 4th | St. Louis Cardinals |
| David Bednar | PA | Mars Area | 2013 | RHP | 2016 | 35 | Padres |
| Randy Bednar | MD | Landon | 2017 | OF | 2017 | 27 | Braves |
| Jeff Belge | NY | Henninger | 2016 | LHP | 2016 | 32 | Red Sox |
| Nigel Belgrave | MA | Auburn | 2020 | RHP | 2023 | 15 | Marlins |
| Jake Belinda | PA | Tyrone | 2013 | RHP | 2017 | 10 | Braves |
| Justin Bench | FL | Calvary Christian | 2018 | SS | 2022 | 17 | Giants |
| Colton Bender | CT | Lyman Memorial High School | 2017 | C | 2021 | 10 | San Diego Padres |
| Kelvin Bender | CA | Serra | 2019 | LHP | 2019 | 17 | Brewers |
| Carmen Benedetti | MI | Grosse Pointe South | 2013 | 1B | 2016 | 12 | Astros |
| Andrew Benintendi | OH | Maderia | 2013 | OF | 2015 | 1st | Boston Red Sox |
| Wes Benjamin | IL | St. Charles East | 2011 | LHP | 2014 | 5 | Rangers |
| Nick Bennett | OH | Moeller | 2016 | LHP | 2016 | 40 | Giants |
| Isaiah Bennett | NC | Pine Forest | 2019 | RHP | 2019 | 36 | San Diego Padres |
| Jake Bennett | OK | Bixby | 2019 | LHP | 2022 | 2 | Nationals |
| Pierce Bennett | MD | Gilman | 2019 | SS | 2023 | 20 | Phillies |
| Tyler Benninghoff | MO | Rockhurst | 2016 | RHP | 2016 | 11 | Twins |
| Trey Benton | NC | West Columbus | 2015 | RHP | 2019 | 15 | Cleveland Indians |
| Jesse Berardi | NY | Commack | 2014 | SS | 2017 | 10 | Indians |
| Ryan Bergert | OH | GlenOak | 2018 | RHP | 2021 | 6 | San Diego Padres |
| Austin Bergner | FL | Windermere Prep | 2016 | RHP | 2016 | 38 | Red Sox |
| Jacob Berry | AZ | Queen Creek | 2020 | OF | 2022 | 1 | Marlins |
| Jay Beshears | FL | Community School of Naples | 2020 | SS | 2023 | 6 | Padres |
| Cuba Bess | CO | Fruita | 2016 | 1B | 2016 | 39 | Rockies |
| Alec Bettinger | VA | Hylton | 2013 | RHP | 2017 | 10 | Brewers |
| Sal Biasi | PA | Hazleton Area | 2014 | RHP | 2017 | 11 | Royals |
| Dante Biasi | PA | Hazleton Area | 2016 | LHP | 2019 | 6 | Royals |
| Tanner Bibee | CA | Mission Viejo | 2017 | RHP | 2021 | 5 | CLE |
| Bo Bichette | FL | Lakewood | 2016 | 3B | 2016 | 2 | Blue Jays |
| Nick Biddison | VA | St. Christopher's | 2018 | SS | 2022 | 4 | Dodgers |
| Michael Bienlien | VA | Great Bridge | 2016 | RHP | 2019 | 24th | Tigers |
| Gabe Bierman | IN | Jeffersonville | 2018 | RHP | 2021 | 7 | Marlins |
| Zachary Biermann | WI | West Bend East | 2015 | 1B | 2019 | 23 | Astros |
| Justice Bigbie | VA | Grassfield | 2017 | 1B | 2021 | 19 | Tigers |
| Greg Billo | IL | Sandburg | 2008 | RHP | 2008 | 28 | Royals |
| Alex Binelas | WI | Oak Creek | 2018 | 1B | 2021 | 3 | Milwaukee Brewers |
| Mac Bingham | CA | Torrey Pines | 2019 | OF | 2019 | 40th | Cubs |
| Ryan Birchard | NY | Auburn | 2021 | RHP | 2023 | 5 | Brewers |
| Brandon Birdsell | TX | Conroe | 2018 | RHP | 2022 | 5 | Cubs |
| Hayden Birdsong | IL | Mattoon | 2019 | RHP | 2022 | 6 | Giants |