Allegations of domestic violence against Russell were posted by a third party on social media in 2017, but Reidy-Russell declined to talk to Major League Baseball at the time.
Russell quickly denied the accusations over the summer and said in a statement that "any allegation I have abused my wife is false and hurtful".
Russell was placed on administrative leave on September 21.
Russell, who was accused of abuse by ex-wife Melisa Reidy-Russell, will participate in a confidential and comprehensive evaluation and treatment program supervised by the Joint Policy Board, per terms of the policy.
In his fourth season with the Cubs, Russell appeared in 130 games for the team this year, batting.250 with five home runs, 38 runs batted in and an OPS.657. The Athletic's Patrick Mooney recently reported (subscription required) that there has been a "sense around the team" that Russell has played his final game as a Cub. "I didn't know what was the right thing to do".
Reidy was in the midst of divorce proceedings from Russell at the time and said that she was counseled to hold off on telling her story until she was more fully prepared to do so. Major League Baseball opened an investigation past year into a similar allegation, which was never closed.
Reidy posted a photo on her Instagram account with a caption suggesting her husband of about 18 months had been unfaithful to her.
Russell was placed on administrative leave on September 21, the day that the allegations widely circulated after a blog post by Reidy-Russell in which she wrote that Russell "put his hands on me". He also said the organization needs to see if there's more it can do to support players and families and make sure a similar situation does not come up in the future. "Domestic violence is everybody's problem, and so we can all find a way to be part of the solution and that's the way I'm personally going to attack it and I think we should all attack it going forward".