In a letter to teams last week, Major League Baseball said numerous clubs' stadiums "fall embarrassingly below the high standards" necessary for women who are part of the game's traveling parties to do their jobs, create an "untenable working environment" and that organizations soon must reconfigure their facilities to fix what the league deemed "unacceptable."

A copy of the memo, which was sent on May 20, was obtained by ESPN.

MLB regulations laid out in a March 16, 2021, memo require that women staffers for home and road teams receive a clean locker room space that is close to the main clubhouse, is private and includes a restroom and shower.

"Over the first six weeks of the season," the memo said, "it has become clear that a number of Clubs are not in compliance with these requirements, particularly with respect to hosting women on visiting teams."