The regular schedule of 154 was shortened due to World War I, with teams playing between 123 and 131 games.
BOS 4
CHC 2
Champ
BOS
1918 MLB Champion Boston Red Sox
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot

World Series

Best of 7-game series
Date    OpponentResultScoreSeries
10/5vs Bos. Red SoxL  0-1 0-1
10/6vs Bos. Red SoxW  3-1 1-1
10/7vs Bos. Red SoxL  1-2 1-2
10/9at Bos. Red SoxL  2-3 1-3
10/10at Bos. Red SoxW  3-0 2-3
10/11at Bos. Red SoxL  1-2 2-4