MLB attendance 2021: 28 of 30 teams down as ballparks reopen

Timeline of how the COVID-19 pandemic has impacted the 2020 Major League Baseball season

With new rules, MLB to draw more than 70 million fans, highest attendance since 2017

MLB Attendance Dipped Significantly From Pre-Pandemic Numbers — College Baseball, MLB Draft, Prospects - Baseball America

Spring training games open with a most welcome sight: Fans back in the stands

MLB season 2021 - Which teams will have fans in the stands on Opening Day? - ESPN

A guide to baseball's reopening: Which stadiums require masks and how many fans can come in?

The state of baseball: The Grand Old Game needs fresh ideas – The Denver Post

Everything you need to know about the 2023 MLB playoff stadiums – NBC Sports Philadelphia

MLB Attendance Has Returned To Pre-Pandemic Levels — But Not At Fenway - Over the Monster