Why is MLB wearing green hats today?
Red Sox Wearing Green Uniforms, Green Hats in Honor of St. Patrick's Day
Logos and uniforms of the Boston Red Sox - Wikipedia
MLB Teams Wearing Green Caps, Jerseys on St Patrick's Day – SportsLogos.Net News
M.L.B. Goes Black and White in Search of Green - The New York Times
The Red Sox celebrated St. Patrick's Day with green uniforms - The Boston Globe
Red Sox without the red: Boston unveils yellow uniforms with Marathon in mind - The Athletic
Cincinnati Reds unveil City Connect uniforms on sale at GABP team shop
Braves unveil City Connect uniforms
Who was first to wear green St. Patrick's Day uniforms?
A look at the Boston Red Sox special St. Patrick's Day green jerseys
MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald
Ranking MLB's all-time greatest uniforms - ESPN