There are 78 former Division I players in the 2018 MLB Divisional Series. There are 56 school represented, with LSU and Vanderbilt leading the way with four each. There are three players from Cal State Fullerton, Connecticut, Miami (Fla.) and Mississippi State, as well as two from Arizona State, Arkansas, College of Charleston, North Carolina, South Carolina, Texas, UCLA and Virginia.
Boston and Cleveland both had 12 former Division I players on their roster. Colorado and Los Angeles both have 11, Houston has nine, Atlanta and New York both have eight and Milwaukee has seven.
| Alabama | David | Robertson | RHP | New York Yankees |
| Arizona State | Austin | Barnes | C | Los Angeles Dodgers |
| Arizona State | Jason | Kipnis | 2B | Cleveland Indians |
| Arkansas | Andrew | Benintendi | OF | Boston Red Sox |
| Arkansas | Dallas | Keuchel | LHP | Houston Astros |
| Auburn | Josh | Donaldson | 3B | Cleveland Indians |
| Baylor | Max | Muncy | 1B | Los Angeles Dodgers |
| Cal State Fullerton | Dylan | Floro | RHP | Los Angeles Dodgers |
| Cal State Fullerton | Kurt | Suzuki | C | Atlanta Braves |
| Cal State Fullerton | Justin | Turner | 3B | Los Angeles Dodgers |
| Clemson | Tony | Sipp | LHP | Houston Astros |
| College of Charleston | Brett | Gardner | OF | New York Yankees |
| College of Charleston | Heath | Henbree | RHP | Boston Red Sox |
| Connecticut | Matt | Barnes | RHP | Boston Red Sox |
| Connecticut | Scott | Oberg | RHP | Colorado Rockies |
| Connecticut | George | Springer | OF | Houston Astros |
| Evansville | Kyle | Freeland | LHP | Colorado Rockies |
| Florida Gulf Coast | Chris | Sale | LHP | Boston Red Sox |
| Fresno State | Aaron | Judge | OF | New York Yankees |
| Georgia | Alex | Wood | LHP | Los Angeles Dodgers |
| Georgia Tech | Charlie | Blackmon | OF | Colorado Rockies |
| Hartford | Sean | Newcomb | LHP | Atlanta Braves |
| High Point | Cody | Allen | RHP | Cleveland Indians |
| Illinois-Chicago | Curtis | Granderson | OF | Milwaukee Brewers |
| Kent State | Travis | Shaw | 3B | Milwaukee Brewers |
| Kentucky | Chris | Rusin | LHP | Colorado Rockies |
| Long Beach State | Garrett | Hampson | 2B | Colorado Rockies |
| Louisville | Chad | Green | RHP | New York Yankees |
| LSU | Alex | Bregman | 3B | Houston Astros |
| LSU | Kevin | Gausman | RHP | Atlanta Braves |
| LSU | Will | Harris | RHP | Houston Astros |
| LSU | DJ | LeMahieu | 2B | Colorado Rockies |
| Miami (Fla.) | Yonder | Alonso | 1B | Cleveland Indians |
| Miami (Fla.) | Ryan | Braun | OF | Milwaukee Brewers |
| Miami (Fla.) | Yasmani | Grandal | C | Los Angeles Dodgers |
| Michigan | Rich | Hill | LHP | Los Angeles Dodgers |
| Mississippi State | Jonathan | Holder | RHP | New York Yankees |
| Mississippi State | Mitch | Moreland | 1B | Boston Red Sox |
| Mississippi State | Brandon | Woodruff | RHP | Milwaukee Brewers |
| Missouri | Ian | Kinsler | 2B | Boston Red Sox |
| Missouri State | Luke | Voit | 1B | New York Yankees |
| Monmouth | Brad | Brach | RHP | Atlanta Braves |
| North Carolina | Chris | Iannetta | C | Colorado Rockies |
| North Carolina | Andrew | Miller | LHP | Cleveland Indians |
| Northeastern | Adam | Ottavino | RHP | Colorado Rockies |
| Northwestern | J.A. | Happ | LHP | New York Yankees |
| Old Dominion | Justin | Verlander | RHP | Houston Astros |
| Ole Miss | Lance | Lynn | RHP | New York Yankees |
| Oregon | Tyler | Anderson | LHP | Colorado Rockies |
| Rice | Brock | Holt | 2B | Boston Red Sox |
| Saint Mary’s | Corbin | Burnes | RHP | Milwaukee Brewers |
| San Diego State | Greg | Allen | OF | Cleveland Indians |
| San Francisco | Adam | Cimber | RHP | Cleveland Indians |
| South Alabama | David | Freese | 3B | Los Angeles Dodgers |
| South Carolina | Jackie | Bradley Jr. | OF | Boston Red Sox |
| South Carolina | Steve | Pearce | 1B | Boston Red Sox |
| South Florida | Dan | Otero | RHP | Cleveland Indians |
| Southeastern Louisiana | Wade | Miley | LHP | Milwaukee Brewers |
| Southern Miss | Brian | Dozier | 2B | Los Angeles Dodgers |
| Stetson | Corey | Kluber | RHP | Cleveland Indians |
| Texas | Corey | Knebel | RHP | Milwaukee Brewers |
| Texas | Brandon | Workman | RHP | Boston Red Sox |
| Texas A&M | A.J. | Minter | LHP | Atlanta Braves |
| Texas Tech | Chad | Bettis | RHP | Colorado Rockies |
| UC Riverside | Joe | Kelly | RHP | Boston Red Sox |
| UC Santa Barbara | Shane | Bieber | RHP | Cleveland Indians |
| UCLA | Trevor | Bauer | RHP | Cleveland Indians |
| UCLA | Gerrit | Cole | RHP | Houston Astros |
| USC | Lucas | Duda | 1B | Atlanta Braves |
| USC Upstate | Chad | Sobotka | RHP | Atlanta Braves |
| Vanderbilt | Walker | Buehler | RHP | Los Angeles Dodgers |
| Vanderbilt | Ryan | Flaherty | 3B | Atlanta Braves |
| Vanderbilt | Tony | Kemp | OF | Houston Astros |
| Vanderbilt | David | Price | LHP | Boston Red Sox |
| Virginia | Brandon | Guyer | OF | Cleveland Indians |
| Virginia | Chris | Taylor | SS | Los Angeles Dodgers |
| West Virginia | Harrison | Musgrave | LHP | Colorado Rockies |
| Western Carolina | Tyler | White | 1B | Houston Astros |