Major League Baseball and the Chicago Cubs moved to distance themselves from one of their own Tuesday, after the news outlet Splinter published a cache of racist emails sent and received by Joe Ricketts, the billionaire whose family owns the Chicago Cubs and Wrigley Field.

Many of the published emails, sent between 2009 to 2013, focused on a fear of Muslims and contained conspiracy theories about former President Barack Obama. The false assertion that Obama, who identifies as Protestant, was Muslim and born outside the United States were prevalent in right-wing politics during his presidency.

In one email, Ricketts wrote to somebody identified only as S.V. that “Christians and Jews can have a mutual respect for each other to create a civil society,” but “Islam cannot do that.” He went on to write that, “we cannot ever let Islam become a large part of our society,” and that “Muslims are naturally my (our) enemy.”

Major League Baseball released a statement condemning the emails but seemingly tried to absolve Ricketts of some responsibility.

The Cubs are owned through a trust the Ricketts family controls.

Joe Ricketts, who earned his fortune as the founder and chairman of brokerage TD Ameritrade, and his wife Marlene, sold $403 million of stock to finance the purchase.

Ricketts’s four children run the Cubs day to day. Tom Ricketts is the chairman; on the board of directors are Pete Ricketts, the Republican governor of Nebraska; Todd Ricketts, finance chairman of the Republican National Committee; and Laura Ricketts, who was a major bundler for the presidential campaigns of Obama and former Secretary of State Hillary Clinton.

The Ricketts family purchased a 95 percent stake in the Cubs and Wrigley Field from the Tribune Company in 2009.

In other sports leagues, offensive behavior has led to owners selling their franchises. Donald Sterling was forced to sell the Los Angeles Clippers of the N.B.A. after a tape of him making racist comments became public. Sterling was banned from the league for life.

Jerry Richardson, the owner of the N.F.L.’s Carolina Panthers, announced he would sell his team shortly after a report came out that revealed he had been accused of sexually harassing employees and making racist comments.

In September, the N.B.A. fined Mark Cuban, the owner of the Dallas Mavericks, for the way he and team officials handled sexual harassment complaints.

For Joe Ricketts, this is not the first time his political activities have harmed the Cubs. He is a major funder of conservative causes and gave $1 million to a political action committee supporting Donald Trump during his presidential campaign.