Clinches: LAA clinched the AL West and home-field advantage in the ALDS. BAL clinched the AL East and home-field advantage in the ALDS. WSH clinched the NL East. LAD and STL have clinched postseason berths.
Due to the strike in 1981, the season was split into two halves and playoff seedings were determined using the winners from each half. The first half began on April 9 and ended June 11, while the second half started on August 10 and ended October 4. Overall standings are presented here for reference but were not used to determine playoff berths.