1921 MLB Imperialism Map

Territory Changes

Team Territory Control

This table shows all teams sorted by the number of territories they control.

Final standings: the St. Louis Browns finished on top with 8 of 16 territories (50.0%).

Team Territories Controlled
St. Louis Browns 8 (50.0%)
Chicago Cubs 8 (50.0%)

Play with the MLB Map

Simulate your own territory battles: spin the wheel, input results, and see what happens.

Editable MLB Map Random MLB Team Generator

Imperialism Map is proudly sponsored by another of my projects:

Territory Creator


Sales territory management software

Because not all territorial conquests happen on the field.

Territory Mapping Software

How MLB Territory Conquest Works

  • Every team starts with the land closest to its ballpark.
  • Win a game and you take all of the loser's territory.
  • Territory carries over all season, with no resets until next year.
  • Click any territory to trace every team that held it.

Full Rules and FAQ

Shared Venues Note

Some teams in this season share a venue location. For visualization purposes, each team's territory boundary is calculated from a slightly offset position (~300 feet apart) to create distinct territories.

  • Sportsman's Park:
    • St. Louis Browns (nudged NE)
    • St. Louis Cardinals (nudged SW)
  • Polo Grounds III:
    • New York Yankees (nudged NE)
    • New York Giants (nudged SW)

Data sources: Game data from Sports Reference; venue data from VenueStats .

📖 I also built MakeCookbook Turn family recipes into a beautiful printed book
Make your own cookbook

Season Records

The standout territory feats of the season.

Biggest Land Grab
+8
St. Louis Browns
in a single day (1921-05-20)
Longest Reign
5
Boston Red Sox
straight days as leader
Most Conquered
134
Cleveland Indians
territories taken all season
Biggest Collapse
−8
St. Louis Browns
lost in one day (1921-05-19)

Team Directory

Each team's season at a glance — days spent leading the map, largest empire, territory conquered, and the rise-and-fall sparkline. Sorted by who dominated.

Cleveland Indians

Dunn Field

26 days led peak 8 +134 taken

Boston Red Sox

Fenway Park

17 days led peak 8 +87 taken

St. Louis Browns

Busch Stadium

16 days led peak 8 +85 taken

New York Yankees

Polo Grounds

10 days led peak 8 +65 taken

Chicago White Sox

White Sox Park

9 days led peak 8 +50 taken

Detroit Tigers

Navin Field

9 days led peak 8 +113 taken

Philadelphia Athletics

Shibe Park / Connie Mack Stadium

3 days led peak 8 +26 taken

Washington Nationals

Griffith Stadium

1 day led peak 8 +30 taken

Chicago Cubs

Wrigley Field

0 days led peak 8 +79 taken

Cincinnati Reds

Redland Field

0 days led peak 8 +73 taken

Brooklyn Robins

Ebbets Field

0 days led peak 8 +65 taken

Philadelphia Phillies

Baker Bowl

0 days led peak 8 +56 taken

Pittsburgh Pirates

Forbes Field

0 days led peak 8 +62 taken

New York Giants

Polo Grounds

0 days led peak 8 +85 taken

St. Louis Cardinals

Busch Stadium

0 days led peak 8 +20 taken

Boston Braves

National League Park

0 days led peak 4 +46 taken

Explore MLB Through the Years

All 156 MLB seasons, 1871 to 2026. Replay any of them game by game, or make your own version.

MLB seasons of the 2020s

MLB seasons of the 2010s

MLB seasons of the 2000s

MLB seasons of the 1990s

MLB seasons of the 1980s

MLB seasons of the 1970s

MLB seasons of the 1960s

MLB seasons of the 1950s

MLB seasons of the 1940s

MLB seasons of the 1930s

MLB seasons of the 1920s

MLB seasons of the 1910s

MLB seasons of the 1900s

MLB seasons of the 1890s

MLB seasons of the 1880s

MLB seasons of the 1870s

More Sports Imperialism Maps

Questions or Feedback?

Got ideas for making these maps better? Found something weird? Want to suggest a new feature?

Get in Touch View FAQ About This Site