Sports Crate Coupon: Save 20%! Last updated by Hello Subscription on March 22, 2018. Subscription Box Coupons & Deals / Sports Crate by Loot Crate Coupons / Sports Crate by Loot Crate: MLB Edition Coupons Make the first comment! Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for LaterGo to commentsNotification Sports Crate has a new coupon code! Save 20% with code MLBOPENING20, valid on MLB Diamond Crate! Check out our Diamond Crate reviews to find out more!