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
10/5at Chi. CubsW  1-0 1-0
10/6at Chi. CubsL  1-3 1-1
10/7at Chi. CubsW  2-1 2-1
10/9vs Chi. CubsW  3-2 3-1
10/10vs Chi. CubsL  0-3 3-2
10/11vs Chi. CubsW  2-1 4-2