Major League Baseball drew 45.3 million fans this year as fans gradually were allowed to return.
The figure was down from 68.5 million over 2019 in the last season before the coronavirus pandemic.
This year's MLB season averaged 18,901 for 2,397 dates.
Only Texas began the 2021 season at 100% capacity, with other United States teams reaching full capacity availability ranging from Atlanta on May 7 to Seattle on July 2.