What happened: The New York Mets posted in recognition of Lou Gehrig Day, Major League Baseball's annual leaguewide observance honoring Hall of Fame first baseman Lou Gehrig and raising awareness for ALS (amyotrophic lateral sclerosis), the disease that bears his name. The post used the #LouGehrigDay hashtag shared by clubs across the sport.

Why it matters: Lou Gehrig Day is observed across MLB each year, with all 30 clubs uniting behind ALS awareness and the '4-ALS' tribute. The Mets' participation places them alongside other clubs backing the ALS fight on the same day, reinforcing a rare leaguewide gesture that transcends standings and rivalries.

What to watch: Watch for in-stadium ceremonies, '4-ALS' uniform patches, and fundraising tie-ins across MLB ballparks as clubs continue the day's tributes.