The temporary rule changes for the 2020 season would continue in the 2021 regular season: A runner will be placed on second base at the start of every half-inning of any game that goes into extra innings. Doubleheaders will be played as two seven-inning games.

AL

Central

TEAMWLPctGB
y 2021 Chicago White Sox LogoChi. White Sox 9669.582-
2021 Cleveland Indians LogoCleveland 8082.49414.5
2021 Detroit Tigers LogoDetroit 7785.47517.5
2021 Kansas City Royals LogoKansas City 7488.45720.5
2021 Minnesota Twins LogoMinnesota 4389.32636.5

East

TEAMWLPctGB
y 2021 Tampa Bay Rays LogoTampa Bay 10062.617-
w 2021 Boston Red Sox LogoBoston 9270.5688.0
w 2021 New York Yankees LogoNY Yankees 9270.5688.0
2021 Toronto Blue Jays LogoToronto  9171.5629.0
2021 Baltimore Orioles LogoBaltimore 52110.32148.0

West

TEAMWLPctGB
y 2021 Houston Astros LogoHouston 9567.586-
2021 Seattle Mariners LogoSeattle 9072.5565.0
2021 Oakland Athletics LogoOakland 8676.5319.0
2021 Los Angeles Angels LogoLA Angels 7785.47518.0
2021 Texas Rangers LogoTexas 60102.37035.0

NL

Central

TEAMWLPctGB
y 2021 Milwaukee Brewers LogoMilwaukee 9567.586-
w 2021 St. Louis Cardinals LogoStL Cardinals 9072.5565.0
2021 Cincinnati Reds LogoCincinnati 8379.51212.0
2021 Chicago Cubs LogoChi. Cubs 7191.43824.0
2021 Pittsburgh Pirates LogoPittsburgh 61101.37734.0

East

TEAMWLPctGB
y 2021 Atlanta Braves LogoAtlanta   8873.547-
2021 Philadelphia Phillies LogoPhiladelphia 8280.5066.5
2021 New York Mets LogoNY Mets 7785.47511.5
2021 Miami Marlins LogoMiami 6795.41421.5
2021 Washington Nationals LogoWashington 6597.40123.5

West

TEAMWLPctGB
y 2021 San Francisco Giants LogoSan Francisco 10755.660-
w 2021 Los Angeles Dodgers LogoLA Dodgers 10656.6541.0
2021 San Diego Padres LogoSan Diego 7983.48828.0
2021 Colorado Rockies LogoColorado 7487.46032.5
2021 Arizona Diamondbacks LogoArizona 52110.32155.0