A new wrinkle has emerged for one of the rule changes recently announced by Major League Baseball and its players' association.

The three-batter minimum rule for pitchers will reportedly be tested in the minor leagues this year, and since it doesn't take effect in the majors until 2020, it could be tweaked if unintended consequences emerge, according to Jayson Stark of The Athletic.

MLB will test the three-batter minimum, along with other changes in the Atlantic League this season after agreeing to a three-year partnership last month. It is not known if this will happen in other leagues as well.

The rule - which was revealed Thursday as a part of a much larger agreement between the union and league - will be unilaterally implemented by commissioner Rob Manfred's office.