The regular schedule of 154 was shortened due to World War I, with teams playing between 123 and 131 games.
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot
The 1918 Cincinnati Reds, managed by Christy Mathewson (61-57) and Heinie Groh (7-3), missed the postseason after finishing the MLB regular season in 3rd place in the NL with a 68-60 record.