The television station, citing Major League Baseball sources, said Kasten has been in touch with McLane and Allen & Company, the New York investment banking firm McLane hired to help him sell the team he's owned since 1992.
"Stan and I have talked and he has said someday he'd like to get back into baseball, but as far as him putting a group together, there's no substance to it," McLane told MLB.com Wednesday night.
Kasten, who returned home to Atlanta on Wednesday after leaving the Winter Meetings, didn't address the topic directly when reached by MLB.com.
"I get asked every day what stuff I'm up to and I don't ever talk about any of it," he said. "I have nothing to say. I haven't talked about any of it, and I'm not going to start now."
Steve Greenberg, who is handling the sale of the Astros franchise for Allen & Company, declined to comment.
Kasten resigned as president of the Nationals in September after being part of the group led by Ted Lerner that was picked by MLB to buy the Nationals in 2006. Kasten previously ran the Braves, the NBA's Atlanta Hawks and the NHL's Atlanta Thrashers.
McLane announced last month he was going to sell the team he purchased for $117 million in 1992.
Brian McTaggart is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.