Answer

<b>I saw the KU softball team won for the first time against a No. 1-ranked team on May 5. When was the last team the KU men’s basketball team defeated a team that was No. 1? </b>

According to StatSheet.com, the KU men’s basketball team last defeated a team ranked No. 1 in the Associated Press poll on April 5, 2008, when the Jayhawks beat North Carolina, 84-66, in the Final Four in San Antonio. KU’s last regular-season win over an AP No. 1 came on Nov. 25, 2007, when the Jayhawks defeated top-ranked Florida, 82-80 in overtime, in the Las Vegas Invitational.