The Texas Rangers could be the first team to return to full attendance capacity.
The team hopes to have a full house for its home opener next month after debuting a new 40,518-seat stadium without fans in the stands for its games last season.
An order by Texas Gov. Greg Abbott took effect Wednesday allowing businesses to operate at 100% if they choose.
Fans at Globe Life Field will still be required to wear masks, even though there is no longer a statewide mandate requiring them.
The Mariners are hoping to have fans at some point this season. The M's are waiting on guidance from the State of Washington.