Division 3 Baseball : Champions : Schools : Streaks : Series records : Most frequent matchups

 
  Ohio Northern 0 - 1 against Adrian

  Games:
    (L)  2025  Ohio Northern 9  -  Adrian 13 (10)   Adrian Regional



 
  Ohio Northern 1 - 0 against Allegheny

  Games:
    (W)  1985  Ohio Northern 9  -  Allegheny 4     Mideast Regional



 
  Ohio Northern 0 - 1 against Anderson (IN)

  Games:
    (L)  1995  Ohio Northern 0  -  Anderson (IN) 6     Mideast Regional



 
  Ohio Northern 0 - 2 against Marietta

  Games:
    (L)  1995  Ohio Northern 3  -  Marietta 12     Mideast Regional
    (L)  1985  Ohio Northern 1  -  Marietta 16     Mideast Regional



 
  Ohio Northern 0 - 1 against North Central (IL)

  Games:
    (L)  1985  Ohio Northern 0  -  North Central (IL) 11     Mideast Regional



 
  Ohio Northern 0 - 1 against North Park

  Games:
    (L)  1984  Ohio Northern 4  -  North Park 9     Mideast Regional



 
  Ohio Northern 1 - 1 against SUNY Oswego

  Games:
    (W)  1984  Ohio Northern 3   -  SUNY Oswego 2      Mideast Regional
    (L)  1984  Ohio Northern 20  -  SUNY Oswego 21     Mideast Regional



 
  Ohio Northern 0 - 1 against Washington-St. Louis

  Games:
    (L)  2025  Ohio Northern 9  -  Washington-St. Louis 10     Adrian Regional



 
  Ohio Northern 1 - 0 against Wooster

  Games:
    (W)  1985  Ohio Northern 8  -  Wooster 7     Mideast Regional