According to ESPN, Under Armour has secured its first major professional sports uniform deal.

According to the site, Under Armour will take over for Majestic Athletic as the official on-field uniform provider for Major League Baseball beginning with the 2020 season.

Team sources confirmed the deal to ESPN, which also gives Fanatics -- the nation's largest seller of online sports gear, which already runs the online MLB Shop -- rights to produce and customize jerseys and sell them at retail.

Read more on ESPN.