But the firm also sent along a statement from one wrestler who wrote that in the locker room, there were “definitely inappropriate things that in my opinion were pretty disgusting going on all around us,” and another who wrote that he had been abused by Mr. Strauss and never told anyone but his father.

Mr. Jordan, an assistant coach on the team in the late 1980s and early ’90s, has maintained that he never saw or heard of inappropriate conduct occurring in the team’s recreational facility, underscoring the shifting nature of some of the claims offered in his defense.

The congressman wavered Friday during his first interview addressing the allegations, on Fox News, first commenting that “conversations in a locker room are a lot different than someone coming up talking about abuse” but later denying that he had ever heard about inappropriate activity.

In the interview, Mr. Jordan also staked out what appears to have become a central part of his defense strategy, borrowed from another prominent Republican who has backed him, President Trump: attacking the news media, CNN in particular.

Mr. Jordan complained last week on Fox News that CNN had aired interviews with one of his most vocal accusers, Mike DiSabato, a former Ohio State wrestler, saying that the network had “rushed” to put someone on TV who has been involved in several lawsuits, including one against the university.

The congressman repeated his attacks on Wednesday, tweeting: “Now @CNN is contacting all 100+ of our former staff and interns asking for dirt on me. Getting desperate! How can you ever trust such #fakenews?”

Supporters have sought to leverage the conservative news media in Mr. Jordan’s defense. The website standwithjimjordan.com has also emerged in recent days, serving as a hub of support. The site features articles from conservative news outlets with headlines like “Media Minimize Anti-Trump Dossier Role of Law Firm in Jim Jordan Wrestling Team Scandal.”