Major League Baseball is famous for outdoor baseball, but weather can have a major impact on games throughout the season. Rain, extreme heat and other conditions have led several MLB teams to play in stadiums equipped with roofs.
So, how many MLB stadiums have a roof?
There are eight MLB ballparks associated with roof systems, including seven retractable-roof stadiums and one traditional fixed-roof dome.
MLB Stadiums With a Roof
Here is the list of MLB ballparks with retractable or fixed roofs:
| Team | Stadium | Roof Type |
|---|---|---|
| Arizona Diamondbacks | Chase Field | Retractable |
| Houston Astros | Daikin Park | Retractable |
| Miami Marlins | loanDepot park | Retractable |
| Milwaukee Brewers | American Family Field | Retractable |
| Seattle Mariners | T-Mobile Park | Retractable |
| Texas Rangers | Globe Life Field | Retractable |
| Toronto Blue Jays | Rogers Centre | Retractable |
| Tampa Bay Rays | Tropicana Field | Fixed roof |
That means roughly 27% of MLB’s 30 traditional team ballparks have some form of roof, while the majority are designed primarily as open-air venues.
Which MLB Stadiums Have Retractable Roofs?
Seven MLB ballparks feature retractable roofs:
Chase Field — Arizona Diamondbacks
Chase Field in Phoenix uses a retractable roof to help protect players and fans from Arizona’s extreme summer temperatures.
Daikin Park — Houston Astros
Home of the Houston Astros, Daikin Park features a retractable roof that can provide protection from Houston’s heat, humidity and rain.
loanDepot park — Miami Marlins
South Florida’s frequent rain and hot summer weather make the retractable roof at loanDepot park an important feature throughout the baseball season.
American Family Field — Milwaukee Brewers
American Family Field has one of MLB’s most recognizable retractable roof designs. It allows the Brewers to host games despite Wisconsin’s unpredictable spring and fall weather.
T-Mobile Park — Seattle Mariners
Seattle’s T-Mobile Park has a retractable roof designed primarily as a weather shield. Unlike many enclosed retractable-roof stadiums, the ballpark can maintain an open-air feel even when the roof covers the field.
Globe Life Field — Texas Rangers
Globe Life Field opened in 2020 and features a retractable roof that allows the Rangers to avoid the extreme Texas summer heat that affected games at their previous stadium.
Rogers Centre — Toronto Blue Jays
Rogers Centre became one of baseball’s most famous roofed stadiums after opening in 1989. Its retractable roof allows the Blue Jays to play regardless of Toronto’s changing weather conditions.
Which MLB Stadium Has a Fixed Roof?
Tropicana Field, traditionally the home of the Tampa Bay Rays, is different from the other stadiums on the list because it has a permanent fixed dome rather than a retractable roof.
The stadium’s recent status has been unusual because of hurricane-related roof damage and the Rays’ temporary relocation. As a result, the number of roofed venues actually being used for MLB games in a particular season can differ from the traditional list of MLB ballparks with roofs.
Why Do MLB Stadiums Have Retractable Roofs?
Retractable roofs give teams the benefits of both indoor and outdoor baseball.
When conditions are favorable, teams can open the roof and provide a traditional outdoor baseball experience. When there is rain, extreme heat or other unfavorable weather, the roof can be closed.
This can significantly reduce the possibility of weather delays and postponements.
Retractable roofs are especially valuable in markets such as Phoenix, Miami, Houston and Arlington, where summer temperatures, thunderstorms or humidity can make outdoor baseball difficult.
How Many MLB Stadiums Are Open-Air?
If eight of MLB’s 30 traditional team ballparks are classified as having roofs, that leaves 22 primarily open-air stadiums.
Some open-air stadiums have extensive coverings over seating areas, but those structures do not provide full-field protection and aren’t considered retractable or domed ballparks.
What Was the First MLB Stadium With a Retractable Roof?
Toronto’s Rogers Centre, originally known as SkyDome, opened in 1989 and became the first MLB stadium with a fully functional retractable roof.
The concept helped influence future baseball stadium construction as teams looked for ways to combine outdoor baseball with protection from difficult weather.
MLB Roofed Stadiums: Quick Facts
- MLB teams: 30
- Ballparks traditionally classified with roofs: 8
- Retractable-roof ballparks: 7
- Fixed-roof ballparks: 1
- Primarily open-air ballparks: 22
- First MLB retractable-roof stadium: Rogers Centre (1989)
Final Takeaway
Roofed stadiums remain a minority in Major League Baseball, but they play an important role in several MLB markets.
Chase Field, Daikin Park, loanDepot park, American Family Field, T-Mobile Park, Globe Life Field and Rogers Centre feature retractable roofs, while Tropicana Field has traditionally featured a fixed dome.
Retractable roofs allow teams to preserve the atmosphere of outdoor baseball when the weather cooperates while providing protection from rain and extreme temperatures when necessary.
For fans wondering how many MLB stadiums have a roof, the traditional answer is eight — seven retractable roofs and one fixed dome, although temporary stadium situations can affect how many roofed venues are actively hosting MLB games in a given season.