When the season began in April, only 9,000 tickets were allowed to be sold per game. Quickly, as vaccine rates increased in Washington, T-Mobile Park allowed up to 5,000 more fans per game given they were fully vaccinated.
T-Mobile Park and the Seattle Mariners define "fully vaccinated" as a person having received the second dose of a two-dose COVID vaccine or the single-dose COVID vaccine two weeks prior to game day.
Fully vaccinated fans are also welcome to shed their masks as of May 17.