Get festive and embrace the luck of the Irish while displaying your team pride with Pittsburgh Pirates St. Patrick's Day clothing and gear from MLB Shop! Browse a great selection of green Pirates |shirts, hats, sweatshirtsPittsburgh Pirates St. Patty's Day merchandise. Snag a new Pirates St. Patrick's Day jersey in Kelly green featuring your team's official graphics for a festive look while you support your team this St. Patrick's Day. Go more casual with a trendy green Pirates St. Patty's Day shirt to join in on the festivities in style. Complete the look with this year's Pittsburgh Pirates St. Patrick's Day hats and accessories. We have everything you need to show off your team spirit this St. Patrick's Day at MLBShop.com.