https://www.espn.com/mlb/story/_/id/40023864/mlb-bringing-back-players-weekend-august
"From Aug. 16-18, a different aspect of players' lives will be highlighted through in-stadium events, game broadcasts and social media.
Day 1 (Aug. 16) will feature their personalities, friendships and off-the-field interests. Day 2 will focus on their charitable causes, and Day 3 will celebrate the people who helped them on their path to the big leagues, including parents, coaches and other mentors.
During the weekend, players will wear special New Era caps featuring each players' uniform number on the side panel in a "youthful design," according to the release. Players also will be able to use customized bats during the games and can wear cleats with personalized designs as well."